34 11 000 Removing And Installing/Replacing Brake Pads On Both Disc Brakes (2 Pistons)

WARNING: This page is about a different car, the 2013 BMW X5, 2012 BMW X5, and 2011 BMW X5. However, it is still accessible from the selected car via links, so may be relevant.

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 FRONT WHEELS .
Remove BRAKE PAD WEAR SENSOR .

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

Installation note:

Attach retaining spring first at top and bottom on brake caliper and then allow to engage in recesses of brake caliper housing.

Fig 1: Removing Retaining Spring

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Remove plastic plugs (1).

Fig 2: Plastic Plugs

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Unscrew guide bolts (1). Withdraw brake caliper backwards.

IMPORTANT: Guide screws (1) are hexagon socket screws (width across flats 9)!
Tie brake caliper back and do not allow to hang from brake hose.

Installation note:

Only clean guide bolts; do not grease.

Check threads.

Replace all guide screws which are not in perfect condition.

Tightening torque 34 11 4AZ .

Fig 3: Guide Screws

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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 .

Fig 4: Pressing Back Brake Pads And Piston

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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.
Observe MINIMUM THICKNESS OF BRAKE PADS .
Do not apply grease to brake lining backplate.

Fig 5: Removing Outer Brake Pad

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Remove outer brake pad (1) in direction of arrow.

Force inner brake pad (2) in direction of arrow off piston and remove.

NOTE: The inner brake pad is seated with springs in the piston or in the brake caliper housing.

Clean brake pads.

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

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

Clean contact surface (2) of brake piston with brake cleaner and apply a thin coating of brake pad paste.

Fig 7: Identifying Contact Surface Of Brake Piston

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Clean contact surfaces (1) of T-heads/brake caliper housing with brake cleaner and apply a thin coating of brake pad paste.

Fig 8: Cleaning Contact Surfaces Of T-Heads/Brake Caliper Housing With Brake Cleaner

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Clean contact surface (1) and brake caliper with brake cleaner and apply a thin coating of brake pad paste.

Fig 9: Identifying Contact Surface Of Brake Caliper

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So as not to damage the surface coating, if possible do not mechanically clean the guide surfaces (1 and 2) for the brake pads on the brake caliper mounting bracket. Clean guide surfaces (1 and 2) with brake cleaner and apply a thin coating of brake pad paste.

Fig 10: Brake Caliper Mounting Bracket Guide Surfaces For Brake Pads

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Fig 11: Identifying Guide Surfaces For Brake Pads On Brake Caliper Mounting Bracket

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Lightly coat the T-head of the inner brake pad with brake pad paste in area (1 and 2).

Fig 12: Coating T-Head Of Inner Brake Pad With Brake Pad Paste

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Lightly coat the T-head of the outer brake pad with brake pad paste in area (1 and 2).

Fig 13: Coating T-Head Of Outer Brake Pad With Brake Pad Paste

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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" mark.
Read and comply with notes on BREAKING IN NEW BRAKE DISCS/BRAKE PADS .
When replacing pads, reset CBS display in accordance with factory specification.