BMW X5: Removing And Installing/Replacing Brake Linings On Both Rear Disc Brakes (Teves Floating Caliper)

Special tools required:

• 34 1 050.
• 34 1 280.

IMPORTANT: The brake pad wear sensor must be replaced once it has been removed (brake pad wear sensor loses its retention capability in the brake pad).

Necessary preliminary tasks:

• Remove wheels.
• Remove brake pad wear sensor.

Fig. 42: Identifying Cover Plug

Lift out retaining spring (1).

Remove cover plug (1).

Fig. 43: Lifting Out Retaining Spring

Unscrew guide screws (2).

Withdraw brake caliper backwards.

IMPORTANT: Tie brake caliper back and do not allow to hang from brake hose.

Installation:

Tightening torque 34 21 4AZ. Clean guide screws only; do not grease.

Check threads.

Replace all guide screws which are not in perfect condition.

Fig. 44: Identifying Plastic Plugs And Guide Screws

IMPORTANT: When pressing down piston, note brake fluid level in expansion tank.

Overflowing brake fluid will damage the paintwork.

Turn piston fully back with special tool 34 1 050.

Fig. 45: Identifying Special Tool (34 1 050)

IMPORTANT: Mark any worn brake linings.

In the event of one-sided brake lining wear, do not change brake linings round.

Remove outer brake pad.

Inner brake lining is located with its spring in the piston.

Clean brake pads.

Do not grease backs of brake linings sleeve.

Fig. 46: Removing Outer Brake Lining

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.

New brake linings may only be installed if the brake disc thickness is greater than or equal to the minimum brake disc thickness (MIN TH).

NOTE: The minimum thickness of the brake disc is designed so that it holds over the service life of a further set of brake pads if it is greater than or equal to the minimum brake disc thickness (MIN TH).

Fig. 47: Identifying Special Tool (34 1 280)

Check dust sleeve (1) for damage and replace if necessary.

IMPORTANT: Dust sleeve must not come into contact with anti-squeak compound as this may cause the dust sleeve to swell.

Clean contact face (2) of brake piston and apply a thin coating of anti-squeak compound.

Fig. 48: Identifying Dust Sleeve

Clean contact surfaces (1...2) of brake lining hammer heads/brake caliper housing and coat with anti-squeak compound.

Fig. 49: Identifying Contact Faces Of Brake Lining Hammer Heads

Clean contact surface (3) of brake caliper and apply a thin coating of anti-squeak compound.

Fig. 50: Identifying Contact Face Of Brake Caliper

Clean brake caliper mounting bracket at hammer head guides and apply a thin coating of anti-squeak compound.

Fig. 51: Locating Brake Caliper Mounting Bracket

NOTE: After completing work:

• Fully depress brake pedal several times so that brake linings contact brake discs.
• When installing new brake linings at front and rear axles, brake fluid level must be brought up to "MAX" marking.
• Read and comply with notes on braking in new brake discs / brake pads.
• If necessary, when replacing pads, reset CBS display in accordance with factory specification.

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