34 21 200 Removing and installing/replacing both brake Pads of rear disc brakes

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2019 MINI Cooper, 2018 MINI Cooper, 2017 MINI Cooper, 2016 MINI Cooper, and 2015 MINI Cooper. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Checking Minimum Brake Disc Thickness

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Special tools required:

IMPORTANT:

Do not mechanically clean the guide surfaces for brake pads to prevent damage to the surface coating. Clean the guide surfaces using brake cleaner, part number 83 19 2 154 780. Carefully clean severely soiled guide surfaces with a suitable tool (e.g. brass wire brush, nylon brush). Then thinly coat with brake pad paste, part 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 instructions for APPLYING BRAKE PAD PASTE to brake pads and caliper carriers!
Retaining pins and expanding spring: For vehicles older than 48 months it is recommended to replace the retaining spring.
Brake pad wear sensor: After removal it must be replaced (brake pad wear sensor loses its retention capability in the break pad).
It is imperative to reset the CBS after each brake pad exchange:
- With a sanded brake pad wear sensor (display in the CBS menu): CBS reset in the car is possible.
- With a brake pad wear sensor that is not sanded: A CBS reset is only possible with the diagnosis system.

Necessary preliminary tasks:

Remove WHEELS .
Remove BRAKE PAD WEAR SENSOR .

Removal:

Fig 2: Locating Brake Caliper Guide Bolts

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Unscrew guide bolts (1).

If necessary, grip at hexagon head (2).

IMPORTANT:

Both guide bolts must be released and then the brake caliper detached towards the rear!

The springs may be bent when only one bolt is released and the brake caliper is folded up!

Remove brake pads (1) in direction of arrow from caliper carrier.

IMPORTANT: Mark any worn brake pads.

Fig 3: Removing Brake Pads From Caliper Carrier

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

Observe MINIMUM THICKNESS of brake pads.

Fig 4: Checking Minimum Brake Disc Thickness

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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 .

Installation:

IMPORTANT: New brake pads may only be installed if the brake disk thickness is greater than the MINIMUM BRAKE DISC THICKNESS .

Fig 5: Bevel Dimension

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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.

Fig 6: Screwing Brake Piston Into Brake Caliper Using Special Tool

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IMPORTANT:

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

Overflowing brake fluid will damage the paintwork.

Screw brake piston into brake caliper using special tool 34 6 306 , 34 6 307 , 34 6 308 , 2 294 516 .

IMPORTANT:

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

Check dust boot for damage and replace if necessary.

Fig 7: Cleaning Contact Surface Of Brake Piston With Brake Cleaner

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

Fig 8: Cleaning Contact Surface Of Brake Caliper With Brake Cleaner

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

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

Fig 9: Cleaning Guide Surface For Brake Pads On Brake Caliper Mounting Bracket

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Fig 10: Applying Thin Coating Of Brake Pad Paste To Both Sides Of T-Head Of Brake Pad In Area

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Apply a thin coating of brake pad paste to both sides of T-head of brake pad in area (1).

NOTE: Brake pad with bulge (1) is intended for accommodating the brake pad wear sensor and must be fitted on the piston side.

Fig 11: Locating Bulge Of Brake Pad

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Replacement:

Replace lining spring (1).

Fig 12: Lining Spring

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Install brake pad (1) in the caliper carrier in direction of arrow.

Fig 13: Installing Brake Pad In Caliper Carrier

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Mount brake caliper.

Insert guide bolts (1) and tighten down.

If necessary, grip at hexagon head (2).

Fig 14: Locating Brake Caliper Guide Bolts

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Installation note:

Replace guide bolts.

Tightening torque 34 21 3AZ .

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" mark.
Read and comply with notes on BREAKING IN NEW BRAKE DISCS/BRAKE PADS .