34 21 320 Removing and installing or replacing both rear brake discs

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2010 BMW 535xi, 2010 BMW 535i, 2009 BMW 535xi, 2009 BMW 535i, and 2008 BMW 535xi. 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
IF NECESSARY, REMOVE AND CLEAN BRAKE PADS

E65 and E66: Release parking brake (push-button to left of steering wheel).

After completing work:

ADJUST HANDBRAKE (not for E65 and E66)
Read and comply with notes on BREAKING IN NEW BRAKE DISCS / BRAKE PADS .

Observe SAFETY INSTRUCTIONS on raising the vehicle.

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 .

Fig 1: Measuring Brake Disc Thickness

Courtesy of BMW OF NORTH AMERICA, INC.

IMPORTANT:

New brake pads may only be installed if the brake disc thickness is greater than or equal to the MINIMUM BRAKE DISC THICKNESS (MIN TH) (not incl. M vehicles).

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).

NOTE:

The minimum brake disc thickness is configured in such a way that it lasts the life of a further set of brake pads (does not apply to M vehicles and perforated brake discs).

Always replace brake discs in pairs.

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

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

NOTE: Brake hose remains connected.

Installation:

Tightening torque 34 21 3AZ .

Fig 2: Identifying Screws

Courtesy of BMW OF NORTH AMERICA, INC.

Unscrew bolts and take off brake disc.

Installation:

Tightening torque 34 21 1AZ .

Clean contact surface of brake disc at wheel hub thoroughly and remove traces of corrosion if necessary. Unevenness on contact surface may result in distortion of brake disc!

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.

Fig 3: Unscrewing Bolts

Courtesy of BMW OF NORTH AMERICA, INC.

IMPORTANT: Internally ventilated brake discs are balanced.
Never remove or reposition balance clips.

Fig 4: Locating Balance Clips

Courtesy of BMW OF NORTH AMERICA, INC.