Alternator: Service and Repair

12 31 020 Removing And Installing Or Replacing Alternator (N55)







Necessary preliminary work:
- Switch off ignition
- Disconnect battery earth lead and cover.
- Remove front charge-air duct.
- Remove rear charge-air duct.
- Remove alternator drive belt.







NOTE:
In order to remove the alternator, it is necessary to remove the air conditioning compressor.
In so doing:
- Do not draw off A/C system refrigerant.
- Do not detach refrigerant lines from A/C compressor.
- Do not remove air conditioning compressor; instead, release from holder only and place to one side.







Release screws (1).
Tightening torque 12 31 1AZ.
Release screw (2).
Tightening torque 12 31 2AZ.
Release screw (3) and remove with holder (4).
Tightening torque 12 31 2AZ.







Unlock connector (1) and remove.
Remove protective cap (2) and release nut underneath.
Tightening torque 12 42 1AZ.
Remove positive battery cable(3).







NOTE: For purposes of improved clarity, illustrations and description show A/C compressor removed.

Release screws (1) a few turns until holder (2) is loose. Do not remove holder (2).
Tightening torque 12 31 3AZ.
Feed out alternator (3) and remove.







Assemble engine.