31 50 001 Removing and installing/replacing front axle differential

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:

REMOVE both output shafts.
Remove PROPELLER SHAFT on front axle differential.
SECURE ENGINE IN INSTALLATION POSITION to prevent it from falling down.
Lower FRONT AXLE SUPPORT .
Remove LEFT ENGINE MOUNT .

IMPORTANT: Danger of injury!
When releasing the last bolt, grip the front axle differential to prevent it from falling down.

Release screws (1 and 2).

Remove front axle differential downwards.

Installation note:

During removal and installation: Replace O-RING .

Coat O-ring with front axle differential oil.

Make sure screws are installed in correct positions.

Bolt (1) M12x55
Screw (2) M12x105

Fig 1: Identifying Front Axle Differential Mounting Screws
Courtesy of BMW OF NORTH AMERICA, INC.

Tightening torque 31 50 1AZ

Check OIL LEVEL IN FRONT AXLE DIFFERENTIAL , correct if necessary.

After installation:

Carry out WHEEL ALIGNMENT PROCEDURE .