Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSBMW2023M4 CSLREPAIR AND DIAGNOSIS (SINGLE PAGE)ACCESSORIES & EQUIPMENTWIPER/WASHER SYSTEMSGENERAL ELECTRICAL SYSTEM -- REPAIR M4 (G82 & G83)61 35 CONTROL UNITS, MODULES61 35 278 REMOVING/INSTALLING BODY DOMAIN CONTROLLER (BDC) CONTROL UNIT (M4 2021-2023)REMOVE THE BDC CONTROL UNIT
2023 BMW M4 CSL
Remove the BDC control unit
2023 BMW M4 CSLSECTION Remove the BDC control unit
Preliminary work
- Refer to DEACTIVATING THE 48 V ELECTRICAL SYSTEM .
- Refer to DISCONNECTING ALL BATTERY GROUND LEADS .
- Refer to REMOVING RIGHT FOOTWELL TRIM .
- Refer to REMOVING DOOR SILL COVER STRIP, INTERIOR RIGHT .
- Refer to REMOVING THE SIDE TRIM PANEL IN THE FOOTWELL AT THE RIGHT-HAND A-PILLAR .
- Unlock detents (1) and feed out the power distribution box (2) downward.
- Fold the carpet (1) to the side.
- Loosen the detents (2).
- Guide cover (3) out in arrow direction.
- Unlock all plug connections and disconnect.
- Release detent (1).
- Feed the BDC control unit (2) out of the bracket in direction of arrow (3).
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.