12 31 020 Removing and installing or replacing alternator (N74)

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Necessary preliminary tasks:

Turn off ignition
Disconnect BATTERY NEGATIVE LEAD
Remove alternator DRIVE BELT
Remove COOLANT RADIATOR
Remove A/C CONDENSER
LOOSEN HYDRAULIC STEERING EXPANSION TANK. DO NOT REMOVE .
Remove HYDRAULIC STEERING PUMP
REMOVE LEFT CLEAN AIR PIPE .

Slacken nut (1).

Release hydraulic fluid lines from holder on alternator.

Fig 1: Identifying Alternator Slacken Nut

G08469627

Courtesy of BMW OF NORTH AMERICA, INC.

Release screws (2) below alternator.

Tightening torque: see 1AZ in 12 31 ALTERNATOR WITH DRIVE AND MOUNTING PARTS .

Fig 2: Identifying Alternator Screws

G08469628

Courtesy of BMW OF NORTH AMERICA, INC.

Tighten screws (2) above alternator.

Tightening torque: see 1AZ in 12 31 ALTERNATOR WITH DRIVE AND MOUNTING PARTS .

Pull alternator towards front a little.

Unlock plug (2) and detach from alternator.

Detach cover (3) and release nut underneath.

Tightening torque: see 1AZ in 12 42 ALTERNATOR LEAD .

Disconnect battery positive lead from alternator

Feed out alternator towards front and remove.

Fig 3: Identifying Alternator Cover, Plug And Screw

G08469629

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: Reassemble the vehicle.

Check stored fault message.

Delete fault memory.