OEM Restraints System Part Replacement Search

2021 BMW 4 Series Convertible


DISABLE PROCEDURE AND TIME (Always Check Service Manual)

• Inspection, testing and installation work may only be carried out by expert trained personnel in BMW Service.
• Work on components of the airbag system should only ever be carried out with the battery disconnected, the negative terminal post covered and the plug connection of the cable leading to the gas generator disconnected. If only the battery is
disconnected, the following prescribed waiting period must be observed without fail:

1 minute for vehicles from 9/93

• When carrying out straightening and welding work with an electric welder:
• Disconnect battery
• Cover negative terminal (post)

REV: 05/2021


Replace following components after airbag deployment:

• Driver airbag module: [AIRBAG, STEERING WHEEL], if deployed
• Steering wheel, (if steering wheel mounted airbag deployed)
• Knee airbag [AIRBAG,KNEE BOLSTER], if deployed
• Passenger airbag module: [AIRBAG,INSTRUMENT PNL], if deployed
• If front passenger airbag deployed; Dashboard trim panel (must be replaced)
• Side seat airbag module. Replace airbag module and seat cover with upholstery [AIRBAG,FRONT SEAT]
• Head Airbag module [AIRBAG, ROOF], if deployed


Check and/or replace following components after airbag deployment:

Satellites (control unit + sensor):
• Sensor B-pillar (left/right)[AIRBAG SENSOR,QTR PANEL]
• Sensor front door (left/right)[AIRBAG SENSOR,FRT DOOR]
• Sensor seat, Driver-/passenger's side [AIRBAG SENSOR,DRV SEAT/AIRBAG SENSOR,PASS SEAT]
• Airbag control unit, vehicle interior [MODULE,AIRBAG CONTROL]
• Front sensor (engine compartment) [AIRBAG SENSOR,FRONT]

Cables and connectors:
• Check cables and connectors for damage, replace if necessary

Seat belt system:
• Automatic reel
• Seat belt tensioner
• Seat belt height adjustment
• Anchor fitting tensioner
• Seat belt buckle

• Seat
• Airbag module
• Active head restraint (if equipped)
• The gas generator can be replaced up to 5 times (if equipped)

Driver's airbag:
• Airbag module
• Steering Wheel
• Steering column (if damaged)

Front passenger airbag:
• Airbag module
• Dashboard trim panel (must be replaced!)
• Supporting tube (if damaged)

Head airbag:
• Airbag module [AIRBAG, ROOF]
• A-pillar trim panel
• Roofliner
• B-pillar trim panel (if damaged)
• C-pillar trim panel (if damaged)
• Connection/mount (on side frame)

Knee airbag
• Trim panel (driver's side)
• Lower section of glove box
• Knee protection (driver's and passenger's sides)

Replace faulty components

Only repair those cables which show visible signs of damage. In the event of visible damage, make sure there is only one cable repair in effect after the repair work. If no visible damage can be identified, the entire cable must be replaced. When carrying out repairs to the airbag wiring harness, you must use the spare parts offered in the out Electronic Parts Catalogue (EPC).

Additional Information

*This matrix does not currently contain all production vehicles sold in the United States. Please refer back to this page frequently to ensure the most up-to-date information. The following charts were developed in cooperation with AudaExplore, a Solera company. The contents are based on the information available at the time of publication. To ensure that the most recent information is used, always refer to the vehicle maker's technical information before working with airbags and other passive restraint systems.

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