12 31 020 Removing and installing or replacing alternator (S65)
WARNING: This page is about a different car, the 2010 BMW M3, 2009 BMW M3, and 2008 BMW M3. However, it is still accessible from the selected car via links, so may be relevant.
Necessary preliminary tasks:
- Switch off ignition
- Follow instructions for disconnecting and connecting battery
- Disconnect battery negative lead and cover. See 61 20 900 DISCONNECTING AND CONNECTING BATTERY NEGATIVE LEAD .
- Remove air filter housing . See 13 71 000 REMOVING AND INSTALLING/REPLACING INTAKE FILTER HOUSING (S65) .
- Remove underbody protection . See 51 47 490 REMOVING AND INSTALLING / REPLACING FRONT UNDERBODY PROTECTION .
- Remove alternator drive belt . See 11 28 010 REPLACING ALTERNATOR DRIVE BELT (S65) .
Release screws.
Unclip hoses from hose holders on radiator.
Carefully press leads (1) to one side.
Release screws.
Pull alternator (1) forwards until connections are accessible.
Unlock plug (1) and remove.
Release nut (2), remove battery positive lead from alternator.
Tightening torque 12 31 1AZ , see 12 31 ALTERNATOR .
Pull alternator (3) upwards to remove.
Add final details to vehicle.
Read fault memory.