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

WARNING: This page is about a different variant/trim than selected.

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!

In order not to damage the surface coating, do not mechanically clean the guide surfaces for the brake pads on the brake caliper bracket if possible. 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).

Necessary preliminary tasks:

Remove front WHEELS .
Remove BRAKE PAD WEAR SENSOR

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

Drive out retaining pins (2).

Remove expanding spring (3).

Remove brake pads (4).

Fig 1: Identifying Brake Pad Wear Sensor, Retaining Pins, Expanding Spring And Brake Pads

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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.

IMPORTANT: Changed expanding springs (1) are installed influently! The cross web (2) must be as shown!

Installation note: Insert the lower retaining pin first, align the expanding spring and then insert the upper retaining pin.

Fig 2: Identifying Expanding Springs

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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 .

Fig 3: Positioning Special Tool (34 1 280) At Three Measuring Points

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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) .

Press brake piston fully back with special tool 34 1 050 .

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

Fig 4: Pressing Brake Piston Using Special Tool (34 1 050)

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Check dust boot (1) for damage and replace if necessary.

Clean brake caliper compartments (2) and apply a thin coating of brake pad paste.

Fig 5: Identifying Dust Boots With Brake Caliper Channels

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

Fig 6: 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.