12 41 020 Removing And Installing/Replacing Starter Motor (S54)

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2006 BMW M3, 2005 BMW M3, 2004 BMW M3, 2003 BMW M3, and 2002 BMW M3. However, it is still accessible from the selected car via links, so may be relevant.

Observe instructions for disconnecting and connecting battery. Refer to 12 00 ... INSTRUCTIONS FOR DISCONNECTING AND CONNECTING BATTERY .

Disconnect battery negative lead from battery.

Remove rear underbody protection.

Remove reinforcement plate on front axle support.

CAUTION: The article DRIVE AXLE SHAFTS & SEAL (FRONT, ALL WHEEL DRIVE) contains important installation instructions.

NOTE: For a better overview, this work step is shown from above and without the intake air manifold. Do not remove intake air manifold and carry out work from below.

Release nuts.

Installation:

Tightening torque, refer to 12 41 4AZ in ENGINE ELECTRICAL SYSTEM - TIGHTENING TORQUES .

Disconnect battery positive leads (1 and 2) from starter motor.

Disconnect lead (3) from starter motor.

NOTE: For a better overview, the illustrations of other BMW cars are used for the following work steps.

Fig 1: Locating Battery Positive Leads On Starter Motor

Courtesy of BMW OF NORTH AMERICA, INC.

Releasing both starter motor mounting bolts (1) on transmission:

Release starter motor screws from transmission output end with a long extension and universal joints.

Installation:

Tightening torque, refer to 12 41 1AZ in ENGINE ELECTRICAL SYSTEM - TIGHTENING TORQUES .

Fig 2: Identifying Starter Motor Mounting Bolts On Transmission

Courtesy of BMW OF NORTH AMERICA, INC.

Withdraw starter motor (1) from transmission flange and remove towards bottom.

Fig 3: Removing Starter Motor From Transmission Flange

Courtesy of BMW OF NORTH AMERICA, INC.

Installation:

Check starter motor pinion and ring gear for damage.

Fig 4: View Of Starter Motor Pinion And Ring Gear

Courtesy of BMW OF NORTH AMERICA, INC.