This press pack accompanied the UK launch of the Lexus SC430 in 2001. Some changes
were made to the model during its time on sale, which can be tracked using the Timeline
feature available on the SC430 archive web page. Additional assets and information relating
to the SC430 may be obtained from the Lexus press office if required.
THE SC430: THE NEW LEXUS ICON
Ever since the Lexus brand was founded, one of the most asked questions to its engineers
and marketeers was ‘When will you build a convertible?’
The answer had in the past, been a Lexus-like silence, as the development team worked on
the apparently insuperable problem of combining Lexus refinement with wind-in-the-hair
pleasure.
This development team referred to their concept as ‘The Jewel of Lexus’, as they knew that
the car they were working on had to become the icon of the whole Lexus range. It had to
combine the essence of the Lexus brand with unique, elegant and timeless styling.
The first hint of the SC430 was shown to the public at the 1999 Tokyo Motor Show, where it
wowed the crowds. After that, it created a similar storm in the United States and Europe. The
production model made its European debut at the 2001 Geneva Motor Show. Its ‘pièce de
resistance’ is its retractable hardtop, which seamlessly folds into a storage area ahead of the
main luggage compartment and transforms the Lexus SC430 from a 2+2 coupe into a
convertible with the push of a button.
Equally important however, are the excellent driving dynamics ensured by 18-inch wheels,
double wishbone suspension and an exceptionally rigid body structure and the highest levels
of performance with refinement from its 286 DIN hp, 4.3-litre V8 engine with Variable Valve
Timing – intelligent (VVT-i), coupled with a five-speed automatic transmission. The new
SC430 adds passion to the Lexus reputation for quality and refinement with an elegant and
curvaceous design and is set to redefine the luxury sports coupe and convertible.
The SC430 comes at a time when the Lexus range has been growing rapidly. The last
quarter of 2000 marked the highly successful launch in Europe of three new models to the
range. The Lexus LS430 luxury sedan, GS430 executive performance sedan and the RX300
luxury sport-utility, strengthened awareness of Lexus in Europe and increased sales by 10%,
with more than 18.000 units sold.
The Lexus family grows again in 2001, with three more additions which redefine key areas of
the luxury car market. Aside from the SC430, there is the new Lexus IS300 sedan that
combines the compact proportions and the outstanding handling of the IS range with more
power, more torque and 5-speed automatic transmission with E-shift push-button gearchange system. The Lexus IS300 SportCross introduces radical new ‘cross-over’ styling
combining dynamic performance and handling, with five-door versatility.
However the new icon of the Lexus range is the SC430, which blends performance, comfort
and refinement, with stunning styling to create a car that delivers the best of both worlds.
Lexus SC430 combines passion and perfection with the roof up or down
• Incorporates some of the most sophisticated automotive technology available, combined
with compact, stylish and avant-garde styling.
• Retractable hard top combines coupe and convertible in one state of the art concept.
• Careful airflow management ensures highest levels of high-speed, top down comfort and
stability, along with a Cd of 0.29 with hard top closed.
• Exhilarating driving experience guaranteed by powerful 286 DIN hp, 4.3 litre, 32-valve V8
engine with Variable Valve Timing - intelligent (VVT-i).
• Exceptionally rigid body structure, double wishbone-type front and rear suspension, 18inch alloy wheels and 245/40 ZR 18 tyres create optimum handling.
• Safety enhanced by high structural integrity, plus ABS, Electronic Brakeforce Distribution
(EBD) , Traction Control (TRC), Vehicle Stability Control (VSC), Brake Assist (BA), Tyre
Pressure Warning System (TPWS) and SRS airbags.
The new Lexus SC430 Sport, the first-ever convertible model from the marque, made its
European debut at the 2001 Geneva Motor Show in March. The new ‘Jewel of Lexus’ and
the flagship of the Lexus range, was designed from the outset to be the world’s finest allround luxury convertible, with an integrated all-metal retractable roof offering the ‘best of
both worlds’. The SC430 combines open-air driving pleasure with Lexus standards of
comfort and refinement and is expected to be a sell-out success when the first cars reach
European showrooms in Summer 2001.
The SC430 combines the highest levels of performance and world-leading refinement and
efficiency from its 286 DIN hp, 4.3-litre V8 engine and five-speed automatic transmission,
with an elegant design and a retractable hardtop that will transform it from a 2+2 coupe into
a convertible at the push of a button.
"The Lexus brand has a status as one of the best in the world, but I wanted to create a car
that would bring an even higher level of prestige to Lexus" said Mr. Yasushi Nakagawa,
Chief Engineer of the Lexus SC430.
"This car would not just be an addition to the Lexus line-up, but would be the finest all-round
luxury convertible. It would offer cutting-edge styling, class-leading performance and
customised convenience, plus a full range of superior and refined equipment, such as the
folding roof, designed to further heighten driving pleasure."
Key design elements
"We were determined to make the SC430 the ‘Jewel of Lexus’, the most prestigious and
exciting Lexus yet made" says Chief Engineer Nakagawa. "It will be the jewel in Lexus
dealerships around the world, with an exquisite beauty, like a precious stone. The envy of all
who see it."
To realise these aims, Mr. Nakagawa defined four development goals that would be met to
give the SC430 its world-leading capability:
• To offer beautiful styling, whether the roof is up or down
• To integrate an all-weather, aluminium convertible roof
• To deliver class-beating performance from a powerful V8 engine
• To combine style and function by offering 2+2 seating
Superior styling
From day one of the design of Lexus SC430, equal importance was attached to both the
interior and exterior styling of the new model, ensuring it is indeed the jewel of the Lexus
range:
"It is a difficult task to produce a vehicle with an image of superior beauty whether the roof is
up or down" said Nakagawa. "When the roof is lowered, the interior becomes part of the
exterior. That is why it needs to be equally elegant and refined. Our Europe Design studio
(ED2) proposed the impressive coupe shape, with a long-wheelbase, short overhangs and
the aggressive 18-inch wheels placed at the four corners of the body to give a powerful
beauty. It is an innovative, yet timeless form which represents both majesty and charm."
"The contrast between the powerful underbody and the compact cabin, further adds to the
car’s presence," says Nakagawa. "And thanks to the power operation of the aluminium roof,
this coupe of extraordinary beauty can transform into a convertible of extraordinary beauty".
Lexus designers from Europe and Japan worked together to create the design, inspired by a
location renowned for high-end luxury – the French Riviera. Products such as highperformance luxury yachts were closely scrutinised to gain insight into truly luxurious
lifestyles, reflected in both the avant-garde exterior and the sophisticated interior styling of
the SC430.
"It is very important to be able to design products that fit the overall environment and the
taste of the people using them" said Chief Engineer Nakagawa. "We discovered that people
on the French Riviera show a clear preference to products and services with a high degree
of simplicity, character, sophistication and quality."
The front of the Lexus SC430 is designed to create a smooth-flowing frontal mask with a
feeling of forward projection. The low set front grille and projector headlight form, combined
with turn signal lights in an impressive single structure, creates a feeling of strength. This is
further reinforced by innovative positioning of the lamp units to add distinctiveness and
elegance.
At the rear of the car, the intention was to create a voluminous feel, combining both avantgarde and traditional luxury styling elements. The rear combination lights, in the same style
as the front of the car, are positioned high on the rear quarters to create a powerful, yet
traditional image similar to many coachbuilt luxury convertibles of the past. More modern
elements include two large chrome-plated baffles in the dual exhausts and reversing lights
set low in the rear bumper to produce both a feeling of stability and a sporty look. Typical of
Lexus’ attention to detail is that when the roof is open, a clean-cut package tray and integral
wind deflector create a clean, sporty and uncluttered image.
"Once the exterior design was completed, I asked my styling team to pay special attention to
the interior" said Nakagawa. "When the top is down, the interior is highly visible so I wanted
the luxurious and sporty theme to continue inside the car."
Designs using moulded plastics were rejected in favour of utilising natural forms and
materials such as wood and leather. As with the exterior styling, the design team sought
expertise from outside of the automobile industry to learn more about traditional
craftsmanship and techniques. This included spending time with the craftsmen at the famous
Yamaha music instrument factory to learn more of their special timber moulding techniques,
used in forming pianos, violins and guitars.
The philosophy was that natural materials have unique, natural constraints on how they can
be manipulated; so rather than using plastic that can be freely moulded, the use of materials
that have limits creates a more natural, clean-cut feeling of luxury. Ironically, such is the
quality of finishing of some of the interior woodwork, that it can be mistakenly assumed to be
synthetic materials.
The use of real wood has even been extended to the cup holders, navigation unit and audio
control, all of which blend perfectly with the surrounding interior styling. A choice of birds-eye
maple or walnut match the surrounding interior colours.
"The wood and leather are integrated into a cabin that is spacious, yet cosy, as in a living
room" says Nakagawa. "The use of wooden panelling helps to construct a genuine world of
leather and wood. It helps to create an opulence that can be found in no other vehicle of its
type."
The SC430’s stylish interior offers a multitude of convenience features. Easy-to-read
analogue gauges, an optional navigation system, a premium audio system which can be
upgraded to a genuine Mark Levinson unit and an advanced climate control that allows the
occupants to enjoy comfortable open-top driving in the widest possible range of outside
temperatures.
The sculpted trim flows into the dash, maintaining the feeling of integrity and quality, with
instrument clusters carefully designed to complement the overall luxurious atmosphere. The
Lexus SC430 maintains the traditional ergonomic layout of analogue-type instrumentation for
ease of use. This is complemented by a digital display which functions as an interface for the
trip computer, and gives access to information regarding fuel consumption, driving range and
average speed.
The front seats feature power adjustment with memory functions for instantly resetting
favourite positions, including mirror and steering adjustments. Additional adjustments for the
front seats include optional seat heaters which have variable control.
The standard combination-wood/leather steering wheel also features power adjustment for
tilt and reach. When the key is removed, the steering wheel automatically retracts to facilitate
ingress and egress. As soon as the key is inserted again, the built-in memory function
returns the steering wheel to its pre-set position.
The interior of the Lexus SC430 is further enhanced by other small touches including the
metallic instrument cluster finish, which achieves a fusion of technology and style.
‘Open-mindedness’
The all-weather, retractable metal convertible roof is without doubt the most significant
feature in both the style and design of the SC430. The ground-breaking feature naturally
presented a number of engineering challenges, but Chief Engineer Nakagawa felt it was vital
to apply the latest technology to open-air cruising. He jokingly calls this philosophy ‘Openmindedness’.
"In this new century, the need to correspond to changes in the environment and safety will
greatly change the automobile, but it is important that with these changes, we do not forget
the essential joy and emotions experienced in driving" says Nakagawa. "We believe, that in
response to this new era, that we had to develop a luxury vehicle in an entirely personalised,
open-minded way, in which the feeling of enjoying the open air can be experienced."
"The 1989 Soarer Aero Cabin featured one of the world’s first electronically operated metaltop targa roofs" says Nakagawa. "Unfortunately the design of the car did not allow for a fully
open top, but I always wondered if I would have the chance to totally remove the roof of a
car. This was my opportunity. When the Lexus SC430 was visualised, we thought of no
other option than providing it with an all-weather type, metal top. We considered it to be the
only way to combine Lexus comfort and quietness with the open-top concept."
With a single touch of a button on the instrument panel of the SC430, the metal top is
electronically activated, folding into the front of the luggage compartment to transform the
coupe into a convertible in about 25 seconds. Safety is ensured as the power hard-top
responds only as long as the button is pressed. If the driver’s hand is removed it
automatically stops.
A lamp indicates when the roof is being activated and a buzzer also sounds to indicate the
start and end of roof operations. When the roof is down, it disappears totally into the rear
bodywork, aided by the ingenious movement of the roof compartment door and a 4-sectional
package tray.
There are 9 points in the roof opening sequence:
1. Fully closed. Driver activates hardtop control switch.
2. Luggage compartment front is unlocked and the side windows automatically open.
3. The front of the trunk lid opens.
4. Roof begins to lift and fold rearwards.
5. Package tray behind seats opens.
6. Roof folds into storage compartment.
7. Package tray folds back into place to leave clean appearance.
8. Luggage compartment closes.
9. Fully open. Driver enjoys the sunshine.
On the move with the roof down, the SC430 continues to maintain the customary standards
of Lexus refinement and comfort, thanks to the use of computer generated ‘wind-wrap’
analysis to carefully control the airflow around and inside the passenger compartment. An air
deflector placed between the rear seat headrests assists in this and further ensures comfort
during high-speed, roof-down cruising by minimising the windflow around the occupants’
head and shoulder area.
In addition to the manufacturer's own wind tunnel, the Maibara wind tunnel which was also
used for the development of the Shinkansen Bullet Train, was utilised because of its very low
background noise which allowed Lexus to concentrate on the reduction of wind noise as
much as possible. Further flow analysis was performed by computer simulation to create a
design which not only enables comfortable open-top driving, but with the retractable hardtop
closed, also achieves a Cd (Coefficient of Drag) of 0,29 with the rear spoiler fitted.
In addition to achieving superior airflow characteristics over the visible body surfaces, careful
tuning of the underbody aerodynamics of the SC430 helps its performance. The installation
of specially shaped covers at various parts of the underfloor allows the active airflow speed
to increase from front to rear. This reduces lift, adds to high-speed stability and contributes
to the resulting low Cd. Finally, spats have been added in front of all four wheels and to the
rear suspension, to minimise the airflow being disturbed by the wheel-arches and the rear
suspension lay-out.
A perfect interior climate, roof up or down.
The Lexus SC430 features one of the world’s most advanced climate control systems that
allows occupants to enjoy more top-down driving time than conventional convertibles. The
system adjusts airflow and temperature automatically, differentiating between top-up and
top-down driving needs.
The air conditioning system features two new lap jets which ensures a perfect temperature
at all times. For open cruising in low temperatures, the lap jets that are located on the centre
console blow warm air into the lower section of the cabin, to keep the legs and laps of the
occupants warm.
When driving with the top down on hot days, the system automatically adjusts the fan speed
and temperature, in order to avoid warmer air reaching passengers. The fan speed is
regulated depending on the vehicle speed. Control is effected in the range 40 to 80km/h to
compensate for the difference of wind flow.
A solar correction control is provided, with a sensor located close to the windscreen. This
sensor measures the effect of the sun’s heat, and adjusts the temperature automatically. As
the effect of the sun is greater with the top down, the system will compensate for this.
Finally, the automatic recirculation system is able to switch the air-inlet mode according to
the concentration of harmful substances (HC and CO) in the air outside the vehicle. The
clean air filter that is incorporated does not only filter pollen and dust from the air but also
has a deodorizing function.
Class-leading performance, ride and handling
The rear-wheel drive SC430 shares with the GS430 models a 286 DIN hp all aluminium,
double overhead-cam, 4.3-litre V8 engine with Variable Valve Timing - intelligent (VVT-i).
The performance of the engine is deliberately designed to feel effortless; enhanced by an
exceptionally high torque capacity of 419Nm at just 3,500rpm and complemented by a Super
ECT (Electronically Controlled Transmission) five speed, intelligent automatic gearbox which
can adapt its gear shift pattern to suit driving style and road conditions.
The SC430 engine is noteworthy for its achievement of a remarkably linear acceleration,
thanks to the use of the ETCS-i, intelligent electronic throttle control system which uses ‘fly
by wire’ technology from the throttle pedal to control the opening angle of the throttle valve in
the injection system. This allows three different modes for throttle manipulation: the normalmode, the power-mode and the snow- mode. Each of these modes has a specific throttle-toaccelerator operation, making the car easier to drive under various conditions. For instance,
when snow-mode is selected, the accelerator pedal will need to be pushed further to achieve
the same engine output, which reduces the risk of wheel-spin or sudden skids.
ETCS-i also controls the idle speed, and is linked to the traction control, the VSC (Vehicle
Stability Control), cruise control and shift shock reduction control. This function allows for a
temporary reduction in engine-output, to make gearshifts smoother.
In addition to a 0-100km/h acceleration time of 6.4 seconds and an electronically controlled
top speed of 250km/h, the sophisticated engine management systems also ensure that the
engine returns a fuel consumption of 12.0 l/100km, with sufficiently low exhaust emissions to
meet the latest Step-IV emissions requirements. The gearbox features line pressure control,
which ensures that line-pressure is optimised in accordance with the engine output and
conditions, enabling smooth yet quick up and down-shifting.
The Artificial Intelligence shift control responds to the road type (winding, up, down) to adapt
its shift-pattern, and it also takes into account the drivers’ style, to anticipate their intentions.
This avoids unnecessary shifting.
Further refinements ensure that the Lexus SC430 will continue to meet the legendary
standards of the marque in reliability and longevity. Valvetrain timing belts are designed with
a maintenance life of 150,000km, while the use of iridium-tipped sparking plugs allows
90,000km of maintenance-free operation.
A further, major refinement which will aid long-term reliability is the use of a digital multiplex
communication system which replaces much of the traditional electrical wiring harnesses
and many sensors. Instead, electronic control units (ECUs) are connected on a single
electronic control line to exchange multiple pieces of coded information.
The SC430 has two systems. The BEAN, (Body Electronics Area Network) controls a ring of
ECUs which are connected in serial to form three loops called ‘daisy chains’. These
exchange information to handle all the car’s body systems, with data being separated by
staggering their timing by microseconds.
The second multiplex system, the AVC-LAN (Audio Visual Communication - Local Area
Network), exchange data in the form of individual clusters called communication frames.
These control the SC430’s audio and communications systems.
High performance, high rigidity platform aids refinement and response
In order to balance power with superior handling and further ensure the ultimate driving
experience, Chief Engineer Nakagawa and his team created a purpose-built highperformance platform for the SC430.
The car features an improved version of the double wishbone independent suspension used
on the GS sedan, but by designing the car as a convertible from the start, engineers were
able to optimise its structure to provide excellent rigidity whether the retractable hardtop is
up or down.
"I wanted to be able to glide into any corner and use powerful acceleration coming out,
without vibration, with the roof down" said Chief Engineer Nakagawa. "The SC430 was
designed with a highly rigid body precisely in response to this desire."
To meet these requirements posed a particular engineering challenge, achieved by placing
particular emphasis on structural rigidity and minimisation of ‘scuttle shake’ (the resonance
created by rough roads and powertrain). Refinements include a large brace supporting the
join between the front fender apron upper member and front pillar, to improve the torsional
rigidity of the front pillar and rocker section, while a bulkhead is placed at the section where
the rocker, front and quarter pillar join to further improve joint rigidity.
Firstly, large cross section rocker panels contribute to increased body rigidity. At the rear,
additional strength at the join between the quarter pillar and rear floor side member, a rear
body cross member, and the use of a heavier gauge steel plate on side members, gives
bodyshell the optimal torsional rigidity. Door panels and A-pillars and other parts are made
out of high strength sheet steel, while the bonnet and hard-top elements are high tension
aluminium sheets, achieving a lower body weight without sacrificing any structural strength.
This structural solidity allows Lexus to attach the front and rear double wishbone suspension
directly to the floorpan, to better utilise the exceptional rigidity of the body. This minimises
vibration and contributes to a smooth ride. The combination of the low centre of gravity and
class-leading torsional rigidity is also designed to deliver a unique mix of responsive
handling and smooth ride compliance over the wide range of road surfaces and driving
conditions found in Europe.
The front double wishbone uses a high mount upper arm and coil springs, while the upper
arm of the rear double wishbone lay-out is made out of aluminium. The shock absorbers are
gas pressurised, and those at the front of the car use a linear control valve and a rebound
spring, to limit the elongation of the suspension during rebounds.
The SC430 is equipped with disc brakes (296mm and ventilated at the front, 307mm and
solid at the rear) and 2-piston callipers all-round. The front callipers are floating, those in the
rear are fixed.
Active and passive safety
The Lexus SC430 is further enhanced by a class leading combination of active and passive
safety.
Since safety is paramount to Lexus, the new SC430 takes advantage of several advanced
technologies. The convertible uses a braking system featuring four-sensor, four-channel
anti-brake system (ABS), Electronic Brakeforce Distribution (EBD), Traction Control, Vehicle
Stability Control (VSC) and Brake Assist. Tyre Pressure Warning System (TPWS) alerts the
driver early on, when pressure in any of the tyres has dropped. EBD monitors all four wheels
during braking and varies brake pressure according to the load on each wheel. Brake Assist
is designed to determine whether the driver is attempting emergency braking and, if the
driver has not stepped hard enough on the brake pedal to maximise the stopping force, it
supplements the applied braking power. As soon as the driver releases the brake-pedal,
EBD discontinues adding braking force.
The VSC system monitors the vehicle's behaviour during cornering and maintains vehicle
stability by using the car’s ABS and traction control sensors to correct oversteer or
understeer before it occurs by limiting rear wheel spin and lightly applying differential braking
on slippery surfaces.
Passive safety is as comprehensively addressed as on every Lexus model. A combination of
driver’s airbag, a dual stage passenger seat airbag that selects the opening speed in
function of the level of the impact, front side airbags, front seat belt pretensioner and force
limiters ensure the highest possible standards of occupant protection.
The body has been designed to prevent impact energy reaching the occupants. In case of a
frontal collision, the front structure of the car crushes the engine compartment, absorbing
much of the energy before it reaches the cabin.
Any side impact energy is transferred to the door impact protection bars, the rocker panels
and the cross members, to minimize absorption of the cabin area.
Inside the cabin, an energy absorbing material has been adopted on the pillars and inside
the roof, to reduce the risk of injury to the occupants’ heads in the event of a crash.
At the front of the SC430, the unique headlamp design offers as standard, projector-style
HID lamps with low beams. Careful development has allowed a 5 lux beam projection
distance onto the road surface of over 100m, creating a significant area of extra night-time
vision and safety. A further safety feature of the SC430 is automatic actuation of the lamps in
low-light situations, picked up by a solar sensor mounted at the base of the car’s
windscreen.
If an accident should happen, the door lock control system will unlock all doors if the airbags
are deployed, in order to aid rescue of the occupants.
Security
To reduce the risk of theft or break-ins, the SC430 is equipped with a number of security
features.
For European models, a double locking function has been added. When the lock switch on
the remote control is pressed twice, this double locking is activated. This prevents the doors
from being unlocked from either the inside or the outside. Pressing the unlock-button on the
remote cancels the operation.
When an attempt is made to forcefully enter the vehicle and the intrusion sensors are
activated, the self-powering siren will sound, and the vehicle’s hazard lights will start flashing
and the dome lamp will be turned on.
When the security system is set, if a door is unlocked without the use of the remote control
key, the alarm will be activated and the door will automatically be locked. The theft deterrent
system also works when the hard-top is down, although the intrusion sensor is then
deactivated.
The engine immobiliser does not allow the engine to start without the correct ignition key
which contains a pre-registered ID code, linked to the car’s ECU.
Handling and dynamics specifically tuned for Europe
The handling and dynamics of the Lexus SC430 models destined for Europe is further
refined to meet the specific range of road surfaces and driving conditions found in Europe.
Much of the work is carried out at the Vehicle Engineering Division, situated in Brussels,
Belgium, close to Lexus’ European headquarters. The division has responsibility for the
evaluation of all pre-production prototypes and is also involved in the development of new
models right from the start, evaluating the initial prototypes and mock-ups and advising on
proposals to ensure optimum ride and handling.
"European driving involves higher sustained speeds, harder acceleration and later braking
compared to driving in Japan or the USA, so we aimed to develop the SC430 to respond
better in those conditions" said Jos De Boes, General Manager, Vehicle Engineering in
Brussels. "The world-leading levels of structural integrity and refinement have made it
possible to tune the car for genuinely rewarding and fun driving responses".
"We sit with the Chief Engineers of each project right from the start. Every new model is a
team effort and the we help ensure that each Lexus model has a similar family resemblance
in their handling characteristics" said de Boes.
"The first priority, as this is a high-class car often driven quickly on open roads, is stability.
This ensures high-speed active safety, even with a wide range of individual driving styles.
The second priority is to maintain the feel of a ‘magic carpet’ ride. Silent and comfortable, yet
stable and fun-to-drive. Quietness and ride quality are a vital part of the Lexus experience."
"I really am excited about the SC430" says de Boes. "With a convertible you need above all,
a good body structure to minimise noise, vibration and harshness. In terms of its chassis and
engine, it is a true Lexus, but with some added extra emotion. The car’s stability is a real
feature. At 220km/h with the roof down it feels much more stable than its rivals. It is a lot
more comfortable at speed too. The roof down aerodynamics, incorporating deflectors which
are integrated into its design, allow a comfortable ride at much higher speeds compared to
other models - and the V8 engine sounds wonderful!"
Compact dimensions, maximum functionality
"Even a sporty car needs to be somewhat functional and the SC430 is certainly that" says
Chief Engineer Nakagawa. "I am particularly proud of using ‘intelligent packaging’ to allow
the creation of a stylish V8 convertible with a length of just 4515 mm, width of 1825 mm and
height of 1370 mm. This car is actually shorter than a lot of D-segment family cars!"
Even within these compact dimensions the SC430 is still capable of 2+2 accommodation.
This offers space in the back seats for children or extra luggage. While the folding roof
occupies some of the space traditionally allocated for luggage, the provision of optional runflat tyres maximises the space remaining, by removing the need for a spare, as well as
further enhancing safety and convenience.
Run-flat tyres
Fitted with the optional run-flat tyres, the SC430 may continue to be driven up to a range of
160 kilometres at speeds of 90km/h with a punctured tyre. The run-flat tyres have reinforced
side walls, that can carry the weight of the car even when there is no pressure left. As a
result, you can even continue driving if the tyre goes flat, doing away with the need for a
spare which frees up space for luggage. But also, there is no need anymore for roadside tyre
changes, adding safety and security.
Tyre Pressure Warning System
The Tyre Pressure Warning System (TPWS), which comes as standard regardless of
whether the car is fitted with run-flat tyres or not, uses pressure sensors inside of the tyres.
These sensors are equipped with antennae, that constantly signal the receiver built inside
the car. As soon as this receiver discovers a discrepancy between the actual tyre pressure
and the set value, it causes a warning buzzer to sound, and a indicator lamp in the
instrument display to light up.
If run-flat tyres are fitted, this is a signal for the driver to reduce his speed. But also when the
car is on normal tyres, the TPWS can still prove extremely helpful, as it gives a driver an
early warning of any pressure changes, giving them the opportunity to react earlier, for
instance by finding a safe spot to change the tyre.
Minimising noise and vibration
The biggest challenge for the designers of any open-topped car is the minimisation of
vibration and noise. It took exceptional levels of development to achieve Lexus standards of
refinement in the SC430, with both roof up and roof down.
Lexus engineers refer to the resonance created by rough roads and powertrain as "SCuttle
shake". The problem usually manifests itself in the 13hz and 18hz frequency ranges and is
particularly noticeable in the cabin and along the top of the windSCreen header rail. The
performance of competitors in this area was measured and the Lexus engineers set out to
create a new benchmark.
The vibration is initially minimised by the provision of additional strength in the A-pillars and
rocker. Strengthening gussets are designed to ensure the optimum rigidity at the joints
between B-pillars and the upper and lower cross members at the rear of the cabin, as well
an expanded rocker section to minimise body deformation. This high torsional rigidity is a
significant contributor to the reduction of resonance in the 13hz range and is further
dramatically enhanced by the provision of ‘V-braces’ at the subframe mounting points. As a
result of model analysis, a large reduction in scuttle vibration is achieved by a change from
conventional mountings to hydraulic mountings.
The engine mount is tuned in such a way that the engine acts as a dynamic damper. This
significantly enhances the resonance performance of the Lexus SC430 in the 18hz range.
Careful tuning contributes to a reduction in roof header lateral vibration. The minimisation of
high frequency wind and road noise is also a priority with the aim of achieving the same
performance as a closed-body car in high-speed cruising on a motorway. Wind tunnel
examination using calculation and scale models were repeated right from the ideas stage of
the design to achieve the highest levels of airflow management.
Developments extend to areas such as control of the airflow under the floor and in the
engine bay, the optimising of sealing systems and the use of sound absorbing materials
beneath the aluminium roof skin.
High frequency road noise is minimised by the expansion of the plastic wheel arch liners
beneath the car. To further enhance the sound deadening characteristics of the soft plastic
mouldings, damping sheets are fitted between the liners and the bodywork to ensure
optimum acoustic performance.
The final result is a car in which not only the figures are class-leading. The perceived quality
of the driving experience is noticeable to the SC430’s occupants, with the roof up or down.
SPECIAL FEATURES
Audio systems
At its inception a decade ago, Lexus introduced new standards for factory-installed audio
systems. In keeping with this tradition, the SC430 features as standard a high-end Lexus
audio system with cassette and CD-player.
And for those who are truly passionate about their music, just like the IS430 the Lexus
SC430 will offer as an option the ultimate in car audio, as a result of a unique collaboration
with the world’s most exclusive maker of home audio systems, Mark Levinson.
The company, based in Middletown, Connecticut, USA, has for the past three decades,
created a unique market worldwide for the very best in audio quality. Its domestic systems
are the preferred choice of professional musicians, film producers and stars when it come to
listening for pleasure.
The Mark Levinson audio system features a 440W low distortion power amplifier and nine
custom-designed Mark Levinson speakers, linked to an LW/MW/FM radio system, cassette
and CD player with 6-CD auto changer mounted in the head unit. The steering wheel
contains the controls for essential functions of the system, and a wooden, electronically
controlled door, similar to a home audio cabinet, hides the sound system controls.
The system has been specifically developed for the SC430, taking not only the volume of
space in the cabin into account, but also the different acoustic environments of closed or topdown driving, the interior angles for imaging, the stabilisation of trim panels, the soundabsorption qualities of the interior materials and the location of each occupant while driving.
To overcome the different acoustic environments with roof up and roof down, the DSP
(Digital Sound Processing) calculates all equalisation parameters, and controls a seamless
transition of the sound as the top is lowered. The SC430’s ASL (Audio Sound Leveller)
system automatically adjusts the volume levels and the low frequency output of the audio
system according to vehicle speed, to maintain the desired sound level and tonal balance.
The main antenna is electrically powered, and is fitted to the rear fender. It can be adjusted
to three different positions between 700 mm and 980 mm in accordance with the radio
reception frequency. The FM sub-antenna is embedded in the windshield glass.
Lexus navigation system (option)
The Lexus navigation system features a DVD which is capable of storing more data and
which allows for faster access and route calculation.
This allows for example, the storage of all of the available European road systems on a
single DVD, removing the need to change discs in the system for long-distance travel. The
Lexus system can even highlight points of interest, search for a house number or find petrol
stations, in addition to showing the car’s exact position at any time on the dashboard screen
and guiding its occupants with voice instructions to any destination of their choice.
The 7-inch wide display also has a three-point manoeuvrable tilt display that reduces the
effect of sunlight reflection on the navigation screen. The system is operated by a
combination of dash mounted controls and touch-screen commands. The most used
functions can be selected through switches on top of the air conditioning control panel, for
easy access.
When not in use, or when the ignition is switched off, the navigation screen is hidden behind
a wooden cover. This does not only help theft prevention, it also takes into consideration the
interior design.
UV cut glass and water repellent glass
All windows of the SC430 have UV cut glass, which blocks both ultraviolet and infrared rays
of sunlight. Filtering ultraviolet light reduces the risk of sunburn, whilst the reduction of
infrared light reduces the sensation of scorching heat being projected through the window
glass.
In addition, the door windows have received a special coating that helps them to dispose of
raindrops more easily, which drastically improves bad weather visibility.
Environment
A lot of time was invested in making the SC430 as environmentally friendly as possible.
Part of the effort was already achieved by the highly efficient modern 4.3-litre engine that
meets Step IV emission regulations, and the aerodynamics of the car that allows for reduced
fuel consumption.
The materials used in the SC430 have also been carefully chosen to allow high levels of
recyclability.
TSOP (Toyota Super Olefin Polymer) and TPO (Thermoplastic Olefin) were extensively used
throughout the vehicle. Bumpers and skirts are made of TSOP, to name just two examples.
The use of lead has been reduced to an absolute minimum. Radiator, heater and the wire
harness contain no lead, and the engine uses far less lead than previously required for
similar types of engines. To quantify, the new SC430 uses about 1/3 of lead compared to the
average amount of lead used in a car in 1996.
LEXUS SC430 SPECIFICATIONS
ENGINE
Engine type
3UZ-FE
Valve mechanism
32 valves DOHC
Displacement (cc)
4,293
Engine layout
V8 with VVT-i
Bore x stroke (mm)
91.0 X 82.5
Compression ratio
10.5:1
Max. Power DIN hp/rpm (kW)
286 @ 5600 (210)
Max. Torque (Nm/rpm)
419 @ 3500
PERFORMANCE
Maximum speed (mph)
155
Acceleration 0-62mph (sec)
6.4
Coefficient of drag (Cd)
0.29
FUEL CONSUMPTION & EMISSIONS
Urban (mpg)
16.4
Extra-urban (mpg)
31.4
Combined (mpg)
23.5
CO2 emissions (g/km)
287
DIMENSIONS
Overall length (mm)
4,515
Overall width (mm)
1,825
Overall height (mm)
1,370
Wheelbase (mm)
2,620
Tread – front (mm)
1,550
Tread – rear (mm)
1,535
Overhang – front (mm)
890
Overhang – rear (mm)
1,005
Luggage capacity (l) – top up, run-flat tyres
368
Luggage capacity (l) – top down, run-flat tyres
135
Luggage capacity (l) – top up, standard tyres
321
Luggage capacity (l) – top down, standard tyres
89
WEIGHTS
Kerb weight (kg)
1,740
Gross vehicle weight (kg)
2,110
SUSPENSION
Front
Double wishbone
Rear
Double wishbone
BRAKES
Front
Ventilated discs, 296mm diameter
Rear
Solid discs, 307mm diameter
Features
ABS with EBD, Brake Assist, TRC, VSC
STEERING
Type
Speed-sensing
progressive
assisted, rack and pinion
Ratio
17.4:1
Turns lock-to-lock
3.3
WHEELS AND TYRES
Wheels
18in aluminium
Tyres
245/40ZR18Z (optional run-flat)
Spare tyre (not provided with run-flat option)
T145/7OR17
LEXUS SC 430 EQUIPMENT LIST
SAFETY
SC 430
Driver & front passenger airbags

Driver & front passenger side airbags

Passenger airbag detection function

Dunlop ‘Fill and Go’ tyre inflation device

Fuel cut-off safety system

power-
ABS with Electronic Brakeforce Distribution (EBD) and Brake
Assist System (BAS)

Vehicle Stability Control (VSC)

Adaptive Front-lighting System (AFS)

LED rear lights

Speed sensitive power steering

Electronic sensing front seatbelt pretensioners with force
limiters

Four three-point seatbelts and headrests

Seatbelt warning system

Multi link windscreen wiper system

Foot operated parking brake

All-round double wishbone suspension

Side impact door bars

Rain sensitive wipers

UV protection glass for all windows

Water repellant side windows

Interior/exterior photochromic anti-glare rear view mirrors

INSTRUMENTS & CONTROLS
7-inch LCD touch-screen Multi-display

Electric headlamp levelling

Digital odometer/trip meter

DVD Lexus Navigator System with voice recognition and
Electronic Traffic Avoidance (ETA)

Bluetooth connectivity

AUDIO
Mark Levinson 9-speaker audio system with 3-band radio and
Dolby cassette

RDS radio with one–touch tuning and presets

In-dash 6-disc CD autochanger

COMFORT & CONVENIENCE
Electrically operated aluminium hard top

Speed sensitive power assisted steering

Electrically adjustable steering column

Remote fuel flap release

Electrically adjustable, heated and foldable rear view mirrors

Driver and front passenger vanity mirrors

Cruise control

Multi-function wood and leather steering wheel

VENTILATION
Climate control air conditioning with solar correction

SECURITY
Vehicle parts marking

Security window etching

Visible VIN

Double locking

SEATING, UPHOLSTERY & TRIM
8-way electrically multi adjustable front seats with 4-way lumbar
support and memory function

Heated driver and passenger seats

Full leather seat upholstery

BODY EXTERIOR
Wave reflection High Intensity Discharge headlamps

Automatic light control system

18inch alloy wheels with locking wheel nuts

Equipment list
Interior
• Speed-sensitive power assisted steering
• Electrically multi-adjustable front seats with lumbar support and memory function
• Cruise control
• Electrically multi-adjustable steering wheel position
• Leather upholstery with heated front seats
• Dual climate control air conditioning system
• Tyre Pressure monitoring system
• Electrochromic rear view mirror
• Optional DVD-based satellite navigation with tilting central console Screen
• Bird’s-eye maple or walnut interior trim
Exterior
• High intensity discharge wave-reflector headlamps, with auto on/off, washers and
automatic levelling
• Front fog lamps
• Electrically adjustable, foldable, heated exterior wing mirrors
• Electric windows with one-touch auto up/down feature on driver’s side
• Key-integrated comprehensive vehicle security system including alarm immobiliser and
double locking 18 inch alloy wheels
• Optional run-flat tyres
• Water repellent glass for windscreen and door windows
Audio
• 9-speaker stereo audio system
• In-dash, single slot, 6 CD changer
• 3 waveband RDS radio with Dolby cassette
• Optional Mark Levinson stereo system