BMW X5 Owners & Service Manuals

BMW X5: Overview Of Front Brakes

Brakes
Fig. 17: Identifying Front Brake Components

  1. Brake disc
  2. Brake caliper
  3. Brake-pad wear sensor
  4. Brake pads
  5. Pulse generator
  6. Brake hose
  7. Brake guard plate
  8. Checking thickness of brake pad

Special tools required:

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:

Lever out retaining spring (1) in direction of arrow towards rear.

Installation:

Attach retaining spring (1) first at top and bottom on brake caliper and then allow to engage in recesses of brake caliper housing.

Brakes
Fig. 18: Removing Retaining Spring

Remove plastic plugs (1).

If necessary, when replacing linings, reset CBS display in accordance with factory specification.

Release guide screws (2) with special tool 34 1 080. See 34 1 080 BIT INSERT. Withdraw brake caliper backwards.

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

Brakes
Fig. 19: Identifying Plastic Plugs

Left:

Pull brake lining wear sensor (1) towards rear out of lining.

If necessary, replace brake lining wear sensor.

Installation:

Only clean guide screws; do not grease.

Check threads.

Replace all guide screws which are not in perfect condition.

Tightening torque 34 11 4AZ.

Brakes
Fig. 20: Pulling Brake Lining Wear Sensor

Remove outer brake pad (1) in direction of arrow.

Force inner brake pad (2) in direction of arrow off piston and remove.

The inner brake pad is seated with a spring in the piston or in the brake caliper housing.

IMPORTANT: Mark any worn brake linings.

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

Observe minimum thickness of brake pads.

Clean brake linings.

Do not apply grease to brake pad backplate.

Brakes
Fig. 21: Removing Outer Brake Pad

IMPORTANT: When forcing piston back:

Brakes
Fig. 22: Identifying Special Tool (34 1 050)

Check minimum brake disc thickness:

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).

Brakes
Fig. 23: Identifying Special Tool (34 1 280)

Check dust sleeve (2) for damage and replace if necessary.

Clean contact face (1) of brake piston and apply a thin coating of anti-squeak compound.

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

Brakes
Fig. 24: Identifying Dust Sleeve

Clean mounting faces (1) and (2) of brake lining hammer heads/brake caliper housing and coat with Plastilube.

NOTE: Grease contact surfaces on brake caliper at top and bottom.

Brakes
Fig. 25: Identifying Mounting Faces And Brake Lining Hammer Heads

Clean mounting face (1) of brake caliper and apply a thin coating of Plastilube.

Brakes
Fig. 26: Identifying Mounting Face Of Brake Caliper

Clean hammerhead guides (1) and apply a thin coating of Plastilube.

Brakes
Fig. 27: Identifying Hammerhead Guides

NOTE: After completing work:

READ NEXT:

 Removing And Installing/Replacing Both Front Brake Discs

Special tools required: 34 1 280. Necessary preliminary tasks: Remove front wheels. Remove and clean brake pads. After completing work, read and comply with notes on braking in new brake disc

 Removing And Installing/Replacing Left Or Right Front Brake Caliper

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 wheel.

 Rear Brakes

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