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.
61 35 278 Removing and refitting (replacing) body domain controller (BDC)
The following points must be strictly observed prior to starting work:
DE-ENERGIZE THE HIGH-VOLTAGE SYSTEM
Observe SAFETY INSTRUCTIONS ON HANDLING HYBRID OR ELECTRIC VEHICLES
Preliminary work needed:
- Refer to CLAMPING OFF BATTERY LEAD FROM NEGATIVE CONNECTION POINT .
- Refer to REMOVING BOTTOM RIGHT INSTRUMENT PANEL TRIM .
- Refer to RELEASING POWER DISTRIBUTION BOX AND SET TO ONE SIDE
Unlock plug connections (1) and disconnect.
Release screw (2) and slide BDC control unit (3) upward slightly.
Tightening torque 61 35 1AZ .
Installation note:
Make sure all plug connections are correctly latched.
Release detents (1) and slide BDC control unit (2) upward slightly.
Installation note:
Please ensure correct latching of the BDC control unit.
Unlock the positive battery cable connector:
- Loosen lock (1) in arrow direction.
- Unlock top positive battery cable connector (2) in arrow direction.
- Disconnect battery positive lead (2).
Feed BDC control unit out of holder.
Replacement:
Carry out VEHICLE PROGRAMMING/CODING .
Resetting additional start lock:
- 01 Drive
- Engine start
- Reset the start inhibit
NO RELATED
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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.