BMW 3 SERIES SEDAN 2004 E46 MRSIII Multiple Restraint System Manual

BMW 3 SERIES SEDAN 2004 E46 MRSIII Multiple Restraint System Manual 3 SERIES SEDAN 2004 E46 BMW BMW https://www.carmanualsonline.info/img/1/5438/w960_5438-0.png BMW 3 SERIES SEDAN 2004 E46 MRSIII Multiple Restraint System Manual
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BMW 3 SERIES SEDAN 2004 E46 MRSIII Multiple Restraint System Manual TABLE OF CONTENTS
Subject Page
Multiple Restraint System (MRS III)  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Components  . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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BMW 3 SERIES SEDAN 2004 E46 MRSIII Multiple Restraint System Manual 2
MULTIPLE RESTRAINT SYSTEM (MRS III) 
INTRODUCTION
The X5 is equipped with the Multiple Restraint System  (MRS III) which employs the use of 
“SMART” technology. Smart technology refers to the co

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BMW 3 SERIES SEDAN 2004 E46 MRSIII Multiple Restraint System Manual 3
COMPONENTS
MRS III CONTROL MODULE
The control module is mounted in the center console area on the driveshaft tunnel below
the center storage box. The X5 will use the TEMIC system that can be recogni

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BMW 3 SERIES SEDAN 2004 E46 MRSIII Multiple Restraint System Manual 4
COMPONENTS
SATELLITE SENSORS
The satellite sensors are mounted below the driver’s and passenger’s front seats on the
seat frame. The function of the sensors is to detect the severity of side imp

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BMW 3 SERIES SEDAN 2004 E46 MRSIII Multiple Restraint System Manual 5
COMPONENTS 
DRIVER’S FRONT AIRBAG
With the MRS III system, the driver’s front airbag becomes a two stage bag similar to the 
passenger’s front side bag, introduced on the 1999 model E38/E39s.

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BMW 3 SERIES SEDAN 2004 E46 MRSIII Multiple Restraint System Manual 6
COMPONENTS
PASSENGER’S FRONT AIRBAG
The passenger’s front airbag is the same unit as installed on E38/E39 vehicles as of 9/98
production. The passenger’s airbag consists of:
• Pressure accum

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BMW 3 SERIES SEDAN 2004 E46 MRSIII Multiple Restraint System Manual COMPONENTS
SIDE AIRBAGS FRONT/REAR (THORAX)
The side airbags continue to be mounted in the door panels on the front and rear doors.
Deployment of the side airbags is dependent on the triggering thresh

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BMW 3 SERIES SEDAN 2004 E46 MRSIII Multiple Restraint System Manual 8
COMPONENTS
HEAD AIRBAG (ITS)
The head airbags are similar to  the ITS bags used on the MRS II system. They continue to be
mounted from the “A” pillar up along the headliner and are anchored behi

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BMW 3 SERIES SEDAN 2004 E46 MRSIII Multiple Restraint System Manual COMPONENTS
BATTERY SAFETY TERMINAL (BST)
As with previous systems, the BST is used to disconnect the battery’s “B+” connection to
the engine compartment in the event of an airbag deployment. The

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BMW 3 SERIES SEDAN 2004 E46 MRSIII Multiple Restraint System Manual 10
COMPONENTS
SEAT BELT TENSIONERS
The seat belt tensioners are a new design
and also make use of the inert gas for trig-
gering. The MRS III control module will
deploy the seat belt tensioners based
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