34 11 220 Removing and installing/replacing both front brake disks

Remove wheels.

If necessary, remove and clean brake linings.

CAUTION: If the thickness of the brake disks drops below the minimum level (MIN TH), the disks must be replaced. Brake disks may only be replaced in pairs (on each axle).
If the brake disks are replaced, you must also fit new brake linings.
The brake disks of M models are tied to the direction of travel:
The uneven part number denotes the left brake disk, the even part number the right brake disk!

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

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, 34 11 2AZ

Fig 1: Releasing Screws & Removing Brake Caliper

Unscrew bolts and take off brake disk.

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

Fig 2: Unscrewing Bolts & Taking Off Brake Disk

Installation:

Clean contact surface of brake disk at wheel hub thoroughly; remove traces of corrosion if necessary. Unevenness on contact surface may result in distortion of brake disk!
Tightening torque 34 11 1AZ

CAUTION: Internally ventilated brake disks are balanced.
Never remove or reposition balance clips.

Fig 3: Identifying Balance Clips