34 11 220 Removing and installing/replacing both front brake discs (S85)

WARNING: This page does not describe the selected car, but rather 10 other vehicles, including the 2010 BMW M6, 2010 BMW 650i, 2009 BMW M6, 2009 BMW 650i, and 2008 BMW M6. However, it is still accessible from the selected car via links, so may be relevant.

Special tools required:

34 1 280

Necessary preliminary tasks:

Remove wheels . See 36 10 300 REMOVING OR INSTALLING FRONT OR REAR WHEEL
If necessary, remove and clean brake linings . See 34 11 000 REMOVING AND INSTALLING/REPLACING BRAKE LININGS ON BOTH FRONT DISC BRAKES . After completing work, read and comply with notes on braking in new brake discs/brake pads .

Check minimum brake disc thickness:

Position special tool 34 1 280 at three measuring points in area (1) and measure.
Compare measurement result and lowest value with setpoint value. See 11 - FRONT BRAKES .

Fig 1: Checking Brake Thickness

Courtesy of BMW OF NORTH AMERICA, INC.

IMPORTANT:

In the case of M vehicles and perforated brake discs, new brake pads may only be installed if the brake disc thickness is greater than the minimum brake disc thickness (MIN TH)

Brake discs may only be replaced in pairs (on each axle).

If the brake discs are replaced, you must also fit new brake pads.

The brake discs of M models are tied to the direction of travel.

The uneven part number denotes the left brake disc, the even part number the right brake disc!

Release screws (1), remove brake caliper and tie up.

Fig 2: Release Screws (1), Remove Brake Caliper And Tie Up

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: Brake hose remains connected. If the brake hose was pulled from the mounting fixture during removal, make sure it is positively attached when installed!

Installation: Tightening torque, see 34 11 2AZ in 11 FRONT BRAKES .

Release screws (1) and remove brake disc (2).

Fig 3: Release Screws (1) And Remove Brake Disc (2)

Courtesy of BMW OF NORTH AMERICA, INC.

IMPORTANT: To release brake disc: Do not under any circumstances strike friction ring with a hammer or similar! If necessary, carefully tap on base of brake disc chamber with a rubber mallet.

Installation: Thoroughly clean contact surface of brake disc on wheel hub and guide pins (3), remove traces of corrosion if necessary.

Brake disc can only be mounted in one position. Replace screws. Tightening torque, see 34 11 1AZ in 11 FRONT BRAKES .