34 21 200 Removing and installing/replacing both rear brake pads of disk brakes (Countryman 2017-2023, except PHEV)

Special tools required :

34 1 050
34 1 280
2 285 574
2 365 377

IMPORTANT:

In order to avoid damage to the surface coating, avoid mechanical cleaning methods for the brake pad guide surfaces on the brake caliper mounting bracket. Instead, clean using brake cleaner BMW part number 83 19 2 154 780 and lightly coat with brake pad paste BMW part number 83 19 2 158 851 (3 gr.) oder 83 19 2 158 852 (100 gr.).
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 !
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!
A CBS reset must be done after every brake pad exchange .
- With a sanded brake pad wear sensor (display in CBS menu): CBS reset possible in vehicle.
- With a non -sanded brake pad wear sensor: CBS reset only possible via diagnostic system.

WARNING: During repair work on the rear brake, it must be ensured that the button for the electromechanical parking brake cannot be pressed!

Preliminary work needed :

REMOVING WHEELS .
Remove BRAKE PAD WEAR SENSOR .

Removal :

Lift out retaining spring (1).

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Disconnect plug connection (1).

Detach cable from holder (2).

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Remove cover plug (1).

Release guide screws.

Detach brake caliper (2).

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

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Hang up brake caliper (1) using cable ties 2 413 317.

Do not let the brake caliper (1) hang on the brake caliper.

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Remove brake pads (1).

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

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Installation :

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 .

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IMPORTANT: 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).

These procedures applies for all the following described brake systems.

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Place special tool 2 285 574, 2 365 377 on brake piston.

Use reversible ratchet (1) to turn back brake piston up to stop.

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

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Check dust boot for damage and replace if necessary.

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

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

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

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

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So as not to damage the surface coating, if possible do not mechanically clean the guide surfaces (1) 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.

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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.

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Apply a thin coating of brake pad paste to T-head of inner brake pad in area (1) and (2).

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Apply a thin coating of brake pad paste to T-head of outer brake pad in area (1) and (2).

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Clean brake pads if necessary.

Mount the brake pads (1).

NOTE: Brake pad with retaining springs (2) must be installed on the piston side.

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NOTE:

Clean guide screws only; do not grease.
Check thread.
Replace all guide screws which are not in perfect condition.

Mount brake caliper (2).

Insert guide bolts and tighten.

Tightening torque 34 21 3AZ .

Install cover plug (1).

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IMPORTANT: When putting on the brake caliper, it is absolutely necessary to make sure that the T-head (1) of the outer brake pad is seated correctly on the contact surface (2).
With brake pads that are already partially worn, particular attention must be paid to the installation position of the outer brake pad in relation to the contact surface (2)!

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Attach cable to holder (2).

Position plug connection (1) and lock.

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Install the retaining spring (1)

IMPORTANT: Ensure the retaining spring is fits securely.

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Required follow-up work :

Installing the BRAKE PAD WEAR SENSOR .
Mount the rear WHEELS .

NOTE: After the repair is finished:

Fully depress brake pedal several times so that brake pads contact brake discs.
When installing new brake pads at front and rear axles, the brake fluid level must be brought up to the "maximum" mark.
Read and comply with notes on BRAKING IN NEW BRAKE DISCS/BRAKE PADS .
Switch on ignition and, using electrical parking brake operating element, open parking brake once, close once and open again.