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 (N63)
Necessary preliminary tasks:
- Switch off ignition.
- Disconnect BATTERY NEGATIVE LEAD .
- Remove right ENGINE SUPPORT ARM .
Unlock connector (1) and remove.
Slacken nut (2).
Tightening torque 12 42 2AZ .
Detach starter positive cable.
Release screws (1).
Tightening torque 12 41 1AZ .
Disengage cable (2) from holder.
Pull out starter in direction of travel, feed out and remove.
Installation note:
When replacing the starter, convert cable holder for cable (2).
Installation note:
Check starter pinion and starter ring gear for damage. If necessary, replace damaged components.
Reassemble the vehicle.
Only during starter replacement and on vehicles with MSA (automatic engine start-stop function):
- Use BMW diagnosis system to reset the starter counter.
Use the Manual With the Right Hardware
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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.
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