34 11 000 Removing and installing/renewing brake pads on both front disc brakes

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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.

Necessary preliminary tasks:

Remove FRONT WHEELS .
Remove BRAKE PAD WEAR SENSOR .
For F03: Remove brake caliper cover.

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 BRAKING IN new brake discs / brake pads.
When replacing pads, reset CBS display in accordance with factory specification.

Lever out retaining spring (1) in direction of arrow towards rear.

Installation note:

Place retaining spring (1) first at top and bottom of brake caliper and then allow to engage in recess (2) of brake caliper housing.

Fig 1: Engaging Recess Of Brake Caliper Housing And Lever Out Retaining Spring

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Remove plastic plugs (1).

Fig 2: Identifying Plastic Plugs

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Unscrew guide bolts (1).

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

Withdraw brake caliper backwards.

Installation note:

Fig 3: Identifying Guide Bolts

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Only clean guide bolts; do not grease.

Check threads.

Replace all guide screws which are not in perfect condition.

Tightening torque: see 4AZ in 34 11 FRONT BRAKE .

IMPORTANT: Mark any worn brake pads.

Remove brake pads in direction of arrow.

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

Observe MINIMUM THICKNESS OF BRAKE PADS .

Clean brake pads.

Do not apply grease to brake lining backplate.

Fig 4: Removing Brake Pads

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IMPORTANT: Mark any worn brake pads.

Equipment specification, high-speed brake system .

Remove brake pads in direction of arrow.

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

Observe MINIMUM THICKNESS OF BRAKE PADS .

Clean brake pads.

Fig 5: Removing Brake Pads (High-Speed Brake System)

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Do not apply grease to brake lining backplate.

IMPORTANT: When forcing piston back:

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

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

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 6: 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).

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

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

Clean contact surface (2) of brake piston and brake pads (3) with BRAKE CLEANER and apply a thin coat of BRAKE PAD PASTE .

NOTE: Grease contact surfaces on brake caliper at top and bottom.

Fig 7: Identifying Dust Boot, Contact Surface And Brake Pads

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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 and apply a thin coating of Never Seez Compound BRAKE PAD PASTE .

Fig 8: Locating Brake Pads Guide Surfaces

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So as not to damage the surface coating, if possible do not mechanically clean pad guides (1). Instead, clean with BRAKE CLEANER and apply a thin coating of Never Seez Compound BRAKE PAD PASTE .

Fig 9: Identifying Pad Guides

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