34 11 000 Removing And Installing/Renewing Brake Pads On Both Front Disc Brakes (Brembo GP II)

Special tools required:

IMPORTANT:

Brake pad wear sensor: after removal it must be replaced (brake pad wear sensor loses its retention capability in the break pad).
Retaining 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 with brake cleaner BMW part no. 83 19 2 154 780 and apply a thin coating of brake pad paste BMW part no. 83 19 2 158 851 (3 g) or 83 19 2 158 852 (100 g).
Spread brake pad paste onto the marked surfaces using a brush!
Observe GUIDELINE FOR APPLYING BRAKE PAD PASTE TO BRAKE PADS AND BRAKE ANCHOR PLATES !

Necessary preliminary tasks:

Remove front WHEELS
Remove BRAKE PAD WEAR SENSOR

Pull brake pad wear sensor (1) forward out of the brake pad (left side only when replacing brake pads).

Release screws (2) and remove brake caliper (3) rearwards.

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

Installation note:

Screws (2) must be renewed.

The new microencapsulated screws must tightened to the prescribed tightening torque within 5 minutes of being screwed in.

Tightening torque 34 11 2AZ .

Fig 1: Identifying Brake Pad Wear Sensor, Brake Caliper, And Screws

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Press back brake pads and piston with special tool 34 1 050 .

IMPORTANT:

When forcing piston back:

Pay attention to brake fluid level in expansion tank; brake fluid that spills over will damage paintwork.

Fig 2: Pressing Back Brake Pads And Piston Using Special Tool (34 1 050)

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Slide out brake pads (1) from the retaining pins in direction of arrow and remove.

IMPORTANT:

Mark any worn brake pads.

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

Do not grease backs of brake pads sleeve.

Clean brake pads.

Fig 3: Sliding Out Brake Pads From Retaining Pins

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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 measurement result and lowest value with SETPOINT VALUE .

IMPORTANT: New brake pads may only be fitted if the brake disc thickness is greater than the MINIMUM BRAKE DISC THICKNESS (MIN TH) .

Fig 4: Positioning Special Tool (34 1 280) At Three Measuring Points

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IMPORTANT:

Thread of brake caliper mounting bracket (1) must be cleaned of screw locking residues from the old screws!

The screw locking residues must be completely removed from the threads.

Fig 5: Identifying Threads Of Brake Caliper Mounting Bracket

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Check dust boot for damage and renew if necessary.

Clean brake caliper compartments (1) and apply a thin coating of brake pad paste.

Fig 6: Identifying Brake Caliper Compartments

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Lightly coat the brake pad contact surface on both sides in area (1) with brake pad paste.

Fig 7: Identifying Paste Application Area

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NOTE: After completing work:

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