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

Special tools required:

34 1 050
34 1 280

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, but rather clean with brake cleaner BMW TI. number 83 19 2 154 780 and apply a thin coating of break pad paste BMW TI. number 83 19 2 158 851 (3 gr.) or 83 19 2 158 852 (100 gr.).

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

Observe GUIDELINE FOR APPLYING BRAKE PAD PASTE ON BRAKE PADS AND BRAKE ANCHOR PLATE !

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).

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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Attention!

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.

Attention!

Changed expanding springs (1) are installed influently!

The cross web (2) must be as shown below!

Installation note:

Fig 2: Identifying Expanding Springs And Cross Web

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

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 3: Checking Minimum Brake Disc Thickness

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Attention!

New brake pads may only be fitted 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).

Fig 4: Locating Bevel Edges

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These procedures applies for all the following described brake systems.

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

Attention!

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

Overflowing brake fluid will damage the paintwork.

Fig 5: 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 6: Identifying Dust Boot And 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 On Both Sides Of Brake Pad Contact Surface

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NOTE: After completing repair 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 brake pads, reset CBS display as per factory specification.