BMW X5: 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 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.
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).
If the brake discs are replaced, you must also fit new brake pads.
Brake discs may only be replaced in pairs (on each axle).
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Fig. 28: Identifying Special Tool (34 1 280)
Release screws (1) and remove brake caliper mounting bracket.
Installation:
Tightening torque 34 11 2AZ.
Brake hose remains connected.
Check that brake hose is correctly seated in holder.
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Fig. 29: Pulling Brake Lining Wear Sensor
Release screw (1) and remove brake disc (2).
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.
Clean contact surface of brake disc at wheel hub thoroughly and remove traces of corrosion.
Unevenness on contact surface may result in distortion of brake disc!
Installation:
Replace screw.
Tightening torque 34 11 1AZ.
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Fig. 30: Identifying Brake Disc Screw
REMOVING AND INSTALLING / REPLACING A BRAKE CARRIER / BRAKE GUARD PLATE AT FRONT
Necessary preliminary tasks:
- Remove front brake disks.
Release screws (1) and remove brake guard plate (2).
Installation:
Tightening torque 34 11 3AZ.
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Fig. 31: Identifying Brake Guard Plate Screw
READ NEXT:
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.
Overview Of Rear Brake
Fig. 40: Identifying Rear Brake Components
Brake disc
Brake caliper
Brake hose
Brake pads
Pulse generator / brake pad sensor
Brake guard plate
Checking thickness of brake pad
REMOVING AND IN
SEE MORE:
Repair Instructions For Bonded Seals
1. General information on handling rubber seal profiles:
If seals reveal partly detached protective film on delivery, they must
not be bonded.
Store seals at 15 ºC to 25 ºC.
If, during the handling, the protective film has come off before
bonding, it can still be bonded.
Bonding at room a
Replacing Crankshaft Pulse Generator (N52, N52K, N51, N53)
IMPORTANT: Read and comply with notes on protection against
electrostatic damage (ESD
protection).
IMPORTANT: Aluminum-magnesium materials.
No steel screws/bolts may be used due to the threat of electrochemical
corrosion.
A magnesium crankcase requires aluminum screws/bolts exclusively.
Aluminum
