Removing the left air distribution flap motor (M21b)
WARNING: This page is about a different car, the 2025 BMW M4, 2024 BMW M4, 2023 BMW M4, 2022 BMW M4, and 2021 BMW M4. However, it is still accessible from the selected car via links, so may be relevant.
WARNING:
Pyrotechnic components.
Danger! Immobilization period-threatening injuries!
Danger! Immobilization period-threatening injuries!
- All work on pyrotechnic parts may be carried out by technically experienced and appropriately trained personnel only.
- Replace any damaged part or ones that have been dropped.
- For additional information see: 72 00 SAFETY REGULATIONS ON HANDLING COMPONENTS WITH GAS GENERATORS .
WARNING:
Airbag unit.
Danger! Immobilization period-threatening injuries!
Danger! Immobilization period-threatening injuries!
- Before performing any work on the airbag, always disconnect the battery ground lead from the battery.
- Airbag unit may only be set down with the cushion (airbag itself) facing upwards.
- For additional information see: 72 00 SAFETY REGULATIONS ON HANDLING COMPONENTS WITH GAS GENERATORS
NOTE:
TECHNICAL INFORMATION
The controller drive must be readdressed after replacement.
Addressing can only be carried out with the diagnosis system.
The controller drive must be readdressed after replacement.
Addressing can only be carried out with the diagnosis system.
Premium repair instructions
Preliminary work
- Refer to ENTER THE INSTALLATION POSITION OF THE DAMPER MOTOR .
- Refer to DEACTIVATING THE 48 V ELECTRICAL SYSTEM .
- Refer to DISCONNECTING ALL BATTERY GROUND LEADS .
- Refer to REMOVING THE TRIM PANEL FOR PEDAL ASSEMBLY .
- Refer to REMOVING LEFT AIR DUCT .
- Refer to REMOVING KNEE AIRBAG .
NOTE:
For a better overview the removed condition is shown here.
- Disconnect plug connection (1).
- Loosen screws (2).
- Remove left air distribution flap motor (3).