31 50 001 Removing and installing/replacing front axle differential

WARNING: This page does not describe the selected car, but rather 18 other vehicles, including the 2015 BMW Alpina B7L xDrive, 2015 BMW Alpina B7 xDrive, 2015 BMW 750i xDrive, 2015 BMW 750Li xDrive, and 2015 BMW 740Li xDrive. However, it is still accessible from the selected car via links, so may be relevant.

IMPORTANT: For the initial filling of a new replacement front axle differential, the gearbox is filled with 600 ml oil! If oil is filled up to the lower edge of the oil filler opening, the gearbox would be overfilled and in rare individual cases oil could emerge from the ventilation opening on the front axle differential.

Necessary preliminary work:

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. See appropriate engine/configuration in ENGINE MOUNTING .

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

Tightening torque 31 50 1AZ

Fig 1: Identifying Front Axle Differential Mounting Screws

Courtesy of BMW OF NORTH AMERICA, INC.

After installation:

Fill FRONT AXLE DIFFERENTIAL WITH OIL .
Carry out WHEEL ALIGNMENT PROCEDURE .