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 31 020 Removing and installing or replacing alternator (N20)
Necessary preliminary tasks:
- Switch off ignition
- Disconnect BATTERY EARTH LEAD and cover.
- Remove INTAKE SILENCER HOUSING .
- Remove CLEAN AIR PIPE , top.
- Remove TENSIONING DEVICE for drive belt.
Release screws (1).
Tightening torque 12 31 1AZ .
Unlock connector (1) and remove.
Release nut (2) and remove the positive battery cable.
Tightening torque 12 42 1AZ .
Disconnect tank ventilation line (3) and place to one side.
Feed out alternator (4) to the left and remove.
Assemble engine.
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.