12 31 020 Removing and installing or replacing alternator (N63)

WARNING: This page is about a different car, the 2011 BMW 750xi, 2011 BMW 750Lxi, 2010 BMW 750xi, and 2010 BMW 750Lxi. However, it is still accessible from the selected car via links, so may be relevant.

Necessary preliminary tasks:

Switch off ignition.
Disconnect BATTERY NEGATIVE LEAD
Remove ACOUSTIC COVER
Remove left and right INTAKE FILTER HOUSINGS
Remove alternator DRIVE BELT
Remove intercooler EXPANSION TANK .
Remove FUEL FEED LINE

IMPORTANT: Risk of damage!
Cover radiator.

Release clamps (1).

Tightening torque 13 71 8AZ .

Release clamps (2).

Replace clamps (2).

Detach both charge-air ducts (3) and remove.

Check gaskets on turbocharger, replacing if necessary.

Fig 1: Identifying Charge-Air Ducts And Clamps

Courtesy of BMW OF NORTH AMERICA, INC.

Picture shows the left side, the procedure for the right side is identical.

Detach hoses (1) from clean-air pipe.

Release screw (2).

Tightening torque 13 71 1AZ .

Detach clean-air pipe (3) in direction of travel from turbocharger.

Check seals on clean-air pipe, replacing if necessary.

Fig 2: Identifying Clean-Air Pipe, Hoses And Screw

Courtesy of BMW OF NORTH AMERICA, INC.

Pull off cable duct (1) from cable holder (2) in upward direction.

Release cable (3) from holder.

Fig 3: Identifying Cable Duct, Cable Holder And Holder Cable

Courtesy of BMW OF NORTH AMERICA, INC.

Pull off plug (1).

Detach cover (2) and release nut underneath.

Tightening torque 12 42 1AZ .

Installation:

Reinstall cover (2) without fail risk of short circuiting!

Fig 4: Identifying Plug, Cover, Battery Positive Lead And Fuel Feed Line

Courtesy of BMW OF NORTH AMERICA, INC.

Disconnect battery positive lead (3) from alternator.

Remove FUEL FEED LINE (4).

Release screws (1) on turbocharger coolant pump (2).

Place turbocharger coolant pump to one side. Do not remove turbocharger coolant pump.

Fig 5: Identifying Turbocharger Coolant Pump And Screws

Courtesy of BMW OF NORTH AMERICA, INC.

Picture shows the left side, the procedure for the right side is identical.

Release screws (1).

Tightening torque 12 31 1AZ .

Fig 6: Identifying Turbocharger Coolant Pump Screws (Left Side)

Courtesy of BMW OF NORTH AMERICA, INC.

Remove alternator (1) together with bracket (2) in direction of travel.

Fig 7: Identifying Alternator And Bracket

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: Check stored fault message.

Add final details to vehicle.

Now clear the fault memory.