34 11 000 Removing and installing/replacing brake pads on both front disc brakes (Brembo)

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

Necessary preliminary tasks

Remove WHEELS .
Remove BRAKE PAD WEAR SENSOR

Release bolts (1) and pull off brake caliper with brake anchor plate towards rear.

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

Installation note:

Tightening torque 34 11 2AZ .

Fig 1: Identifying Brake Anchor Plate Bolts

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IMPORTANT: When pressing down piston, note brake fluid level in expansion tank.
Overflowing brake fluid will damage the paintwork.

Turn piston back fully with special tool 34 1 050 .

Fig 2: Turning Piston Back Fully With Special Tool 34 1 050

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Pull brake pads (1) off guide pins (2) and remove.

IMPORTANT: Mark any worn brake pads.
In the event of one-sided brake pad wear, do not change brake pads round.

Observe MINIMUM THICKNESS OF BRAKE PADS .

Installation note:

Clean brake pads, brake caliper and guide pins.

Do not grease backs of brake pads sleeve.

Brake pads must be correctly seated on guide pins.

Fig 3: Pulling Brake Pads Off Guide 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 measuring result and lowest value with SETPOINT VALUE .

Fig 4: Checking Minimum Brake Disc Thickness
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IMPORTANT: New brake pads may only be fitted if the brake disc thickness is greater than the MINIMUM BRAKE DISC THICKNESS (MIN TH).

IMPORTANT: Do not grease brake pads and guides with brake pad paste.

Clean contact surface (1) of brake pistons with brake cleaner.

Fig 5: Cleaning Contact Surface Of Brake Pistons With Brake Cleaner

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Replace expanding spring (1).

Fig 6: Identifying Expanding Spring

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NOTE: After completing work:

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