Removing and installing/replacing both rear brake pads of disc brake (X5 M)

Special tools required: 

• 34 1 050
• 34 1 280
• 2 352 960

Attention! 

• Brake pad wear sensor: After removal it must be replaced (brake pad wear sensor loses its retention capability in the break pad). 
• Retaining pins and expanding spring: for vehicles older than 48 months it is recommended to replace the retaining spring! 

So as not to damage the surface coating, if possible do not mechanically clean the guide surfaces for the brake pads on the brake caliper mounting bracket. Instead, clean surfaces with brake cleaner BMW part number 83 19 2 154 780. Then thinly coat with brake pad paste BMW part number 83 19 2 158 851 (3gr.) or 83 19 2 158 852 (100 gr.). 

Spread brake pad paste onto the marked surfaces using a brush! 

Observe REGULATION ON APPLYING BRAKE PAD PASTE TO BRAKE PADS AND BRAKE ANCHOR PLATES !

Necessary preliminary tasks: 

• Remove WHEELS .
• Remove BRAKE PAD WEAR SENSOR .

Removal: 

Lift out retaining spring (1).

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Remove cover plug (1).

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Unscrew guide bolts (1).

Withdraw brake caliper backwards.

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

Remove brake pads.

Attention! 

Mark any worn brake pads.

In the event of one-sided brake pad wear, do not change brake pads round.

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Preparation for installation: 

Attention! 

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

Overflowing brake fluid will damage the paintwork.

Turn the piston back to the limit position with special tool 2 352 960.

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Check minimum brake disc thickness: 

• Position special tool 34 1 280 at three measuring points in area (1) and measure.
• Compare measuring result and lowest value with SETPOINT VALUE .

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Attention! 

New brake pads may only be installed if the brake disk thickness is greater than the MINIMUM BRAKE DISC THICKNESS .

Attention! 

If new brake pads are mounted on a brake disc, the following must be observed: 

• Bevel edges in the area (1) slightly (dimension A must not exceed maximum 1 mm).

These procedures applies for all the following described brake systems.

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Check dust boot for damage and replace if necessary.

Clean contact surface (1) of brake piston with brake cleaner and apply a thin coating of brake pad paste.

Attention! 

Dust boot must not come into contact with brake pad paste as this may cause the dust boot to swell.

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Clean contact surfaces (1) of T-heads/brake caliper housing with brake cleaner and apply a thin coating of brake pad paste.

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Clean contact surface (1) of brake caliper with brake cleaner and apply a thin coating of brake pad paste.

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So as not to damage the surface coating, if possible do not mechanically clean  the guide surfaces (1) for the brake pads on the brake caliper mounting bracket. Clean guide surfaces (1) with brake cleaner and apply a thin coating of brake pad paste.

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So as not to damage the surface coating, if possible do not mechanically clean  the guide surfaces (1 and 2) for the brake pads on the brake caliper mounting bracket. Clean guide surfaces (1 and 2) with brake cleaner and apply a thin coating of brake pad paste.

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Lightly coat the T-head of the outer brake pad with brake pad paste in this area (1).

Apply a thin coating of brake pad paste to the contact surfaces (2).

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Lightly coat the T-head of the inner brake pad with brake pad paste in this area (1).

Apply a thin coating of brake pad paste to the contact surfaces of the brake piston (2).

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Installation: 

Install the brake pads in the brake caliper.

Install the brake caliper in the direction of the arrow.

Clean guide bolts (2), but do not grease.

Insert screws (2) and tighten.

Tightening torque 34 21 4AZ. .

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Install cover plug (1).

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Install the retaining spring (1)

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Required follow-up work 

• Install the BRAKE PAD WEAR SENSOR .
• Install WHEELS at the rear.