Automotive technology is using an increased amount of electronic components that require a variety of sensors to
ensure the proper function of vehicle systems. These systems are providing the conveniences that today’s drivers
want, and the safety and efficiency solutions they need. On a compact-class vehicle, there can be as many as 50
sensors installed, and since sensors are a wearing part this presents a business opportunity for today’s shops.
All Bosch sensors are easy to replace and are fine-tuned to specific vehicle models so you can be sure you will
receive the exact sensors you need.
From engine management to passive safety, Bosch offers a comprehensive range of sensors to the aftermarket,
that are the same as those manufactured for the OE. In addition to the Mass Air Flow Sensors, Bosch also offers
Oxygen Sensors, Wheel Speed Sensors, Pressure Sensors, Temperature Sensors, Knock Sensors and many more.
Accurate and Reliable: Bosch Sensors
Temperature Sensors
Pressure Sensors
Engine Position
Air Management
„„Low Pressure Sensors
(oil, fuel, coolant)
Sensors
Sensors
„„Crankshaft Sensors
„„Mass Air Flow Sensors
„„High Pressure Sensors
(fuel)
„„Camshaft Sensors
„„Manifold Intake Pressure
Sensors
„„Differential Pressure
Sensors
„„Knock Sensors
„„Throttle Sensors
Mass Air Flow Sensors
Optimum performance and low
levels of harmful emissions
Robert Bosch LLC
Broadview, Illinois 60155
www.boschautoparts.com
2213934 1213 F00E3817264UG
© 2013 Robert Bosch LLC, U.S.A. All rights reserved.
BOSCH is a trademark licensed by Robert Bosch GmbH
and/or its affiliated entities.
To comply with the legal emissions limits for motor vehicles, the pollutant levels in the exhaust gas
Features And Benefits
of internal combustion engines must be minimized while the combustion process is optimized. This
„„ Accurate air flow measurement to very fine tolerances for efficient engine performance
requires mixing the air and fuel in a precisely defined ratio, utilizing a mass air flow (MAF) sensor to
„„ OE technology ensures correct funtion and calibration for trouble-free operation
record the exact air mass flow, then transmiting it in the form of an electrical signal to the ECU.
„„ Guaranteed to match vehicle requirements for performance, drivability, fuel economy and emissions
Bosch MAF sensors ensure low levels of harmful emissions, greater fuel efficiency, and improved
engine performance. Precision engineered and tested to OE specifications, Bosch MAF sensors are
„„ Bosch supplies the sensor and housing in one unit for efficient and accurate engine performance
„„ Durability of exhaust parts ensured
developed in conjunction with the vehicle manufacturers. This guarantees they will match vehicle
requirements for performance, drivability, fuel economy and emissions.
Mass Air Flow Sensors
With Hot-Film Technology
2
Critical component for
accurate performance of
the modern engine.
1
Measurement tube
2
Plug-in sensor with
sensor element
Mass air flow sensors consist of a measurement
tube into which the sensor element is inserted.
The dimensions of the measurement tube vary
depending on the measuring range requirements.
1
There are measurement tubes of different sizes
and design to suit the required air throughput.
HFM7-ID (Integrated
Deflection Bypass)
The newest product family HFM7 has an
Water and
particulate exit
Sensor
chip
Deflection
integrated deflection bypass in addition
edge
to the latest film technology. This Bosch
patented design ensures increased
robustness against water and particulate
contamination, reduces drift over liftime
Vortex
Deflection
steps
fins
and reduced pressure drop.
Bosch only supplies the sensor and housing
as one unit. Once assembled, the sensor
is calibrated to ensure measurement to
very fine tolerances for proper engine
Evaluation of Back to Back Testing
performance. If the sensor is altered the
Warning!
calibration will be lost resulting in potential
for reduced engine power, higher fuel
Attempts to imitate and/or work around the Bosch
consumption and failed emissions tests.
patented design will result in an inferior product that
will display some or all of the following side effects:
„„ Rough idle
„„ Poor fuel economy
„„ High emissions, or
failed emissions test
„„ Engine hesitation
Application Coverage
Currently Bosch offers a program consisting of over 140 part numbers covering more than 22.2 million
Mass Air Flow Sensor
vehicles in operation, including European and domestic applications.