BMW 7 Series: Removing And Installing/Replacing Airbag Control Unit

IMPORTANT: Read and comply with NOTES on protection against electrostatic damage (ESD protection)!

WARNING: NOTE AIRBAG SAFETY INSTRUCTIONS! Incorrect handling can activate airbag and cause injury.

Necessary preliminary tasks

• F01/02: Clamp off BATTERY NEGATIVE LEAD
• F03Remove both negative battery cables
• Remove UPPER INSTRUMENT PANEL STORAGE COMPARTMENT
• Remove trim for instrument panel, bottom left.

Release screw (1).

Tightening torque 65 77 1AZ.

Press airbag control unit (2) in direction of arrow out of rubber mounts (3).

Feed out airbag control unit (2) towards bottom.

Fig. 109: Identifying Screw And Airbag Control Unit

Unlock plug connections (1) and (2) on airbag control unit (3) and disconnect.

Fig. 110: Identifying Plug Connections And Airbag Control Unit

Installation

Make sure guides (1) are correctly seated in rubber mount (2).

Fig. 111: Identifying Guides And Rubber Mount

Replacement

Carry out VEHICLE PROGRAMMING/ENCODING.

REMOVING AND INSTALLING/REPLACING CENTRAL SENSOR

WARNING: Note AIRBAG SAFETY INSTRUCTIONS ! Incorrect handling can activate airbag and cause injury.

Necessary preliminary tasks

• Clamp off BATTERY NEGATIVE LEAD
• Remove COMPLETE CENTRE CONSOLE

Unscrew nuts (1).

Remove holder (2) from center console wiring harness (3).

Fig. 112: Identifying Nuts, Holder And Centre Console Wiring Harness

Unscrew nuts (1).

Tightening torque 65 77 5AZ.

Remove sensor (2).

Unlock plug connection (3) and disconnect.

Installation: Make sure sensor is mounted without play.

Fig. 113: Identifying Nuts, Sensor And Plug Connection

REMOVING AND INSTALLING/REPLACING EMERGENCY POWER SIREN WITH TILT SENSOR

Necessary preliminary work

• Remove GUIDE FOR BUMPER AT REAR RIGHT

Secure guide for bumper (3) against falling out.

Unfasten plug connection (1) and disconnect.

Slacken nut (1).

Fig. 114: Identifying Bumper, Plug Connection And Slacken Nut

Unlock catch (1).

Remove emergency power siren (2) from guide for bumper (3).

Catch (1) must not be damaged.

Make sure emergency power siren (2) is correctly seated on guide for bumper (3).

Fig. 115: Identifying Catch, Bumper And Power Siren

Replacement

Carry out VEHICLE PROGRAMMING/ENCODING.

REMOVING AND INSTALLING/REPLACING FRONT LEFT SENSOR (US VERSION ONLY)

Necessary preliminary tasks

• Remove FRONT LEFT WHEEL ARCH COVER

NOTE: This work step varies according to engine type.

Release screw (1) on auxiliary radiator bracket (2).

Remove holder (2) and carefully place to one side.

Installation

Holder (2) must be correctly seated in the designated guides.

Fig. 116: Identifying Screw, Holder And Bracket

Release screws (1) on lock carrier (2).

Tightening torque 65 77 2AZ.

Feed out sensor (3).

Unfasten plug connection (2) and disconnect.

Installation: Make sure sensor (3) is in correct installation position.

Sensor surface must point upwards.

Plug connection (2) must point in opposite direction to direction of travel.

Fig. 117: Identifying Screws, Lock Carrier, Plug Connection And Sensor

REMOVING AND INSTALLING/REPLACING FRONT RIGHT SENSOR (US VERSION ONLY)

Necessary preliminary tasks

• Remove FRONT RIGHT WHEEL ARCH TRIM

NOTE: This operation depends on the engine version.

Release screw (1) on auxiliary radiator bracket (2).

Remove auxiliary radiator bracket (2) and carefully place to one side.

Installation: Auxiliary radiator bracket (2) must be correctly seated in the designated guides.

Fig. 118: Identifying Screw And Auxiliary Radiator Bracket

Release screws (1).

Tightening torque 65 77 2AZ.

Feed out acceleration sensor (2).

Unlock plug connection (3) and disconnect.

Installation: Make sure acceleration sensor (2) is in correct installation position.

Sensor surface of acceleration sensor (2) must point upwards! Plug connection (3) must point in opposite direction to direction of travel.

Fig. 119: Identifying Screws, Acceleration Sensor And Plug Connection

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