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.
12 41 020 Removing and installing/replacing starter motor (N54, N54T, N55)
Necessary preliminary work
- Read out the fault memory of the DME control unit.
- Switch off ignition.
- Disconnect BATTERY NEGATIVE LEAD .
- Remove intake plenum . See 11 61 050 REMOVING AND INSTALLING INTAKE PLENUM (N54, N54T) or 11 61 050 REMOVING AND INSTALLING INTAKE PLENUM (N55) .
Unlock connector (1) and remove.
Release nut (2) and remove the positive battery cable.
Tightening torque 12 42 2AZ .
Release screws (3) and remove starter motor (4).
Tightening torque 12 41 1AZ .
Tightening torque 12 41 2AZ .
Installation note:
Check starter pinion and ring gear for damage, replace starter motor if necessary.
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.