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

WARNING: This page is about a different variant/trim than selected.

Special tools required:

34 1 280
34 6 306
34 6 307
34 6 308
34 6 309 . See BRAKES - SPECIAL TOOLS -- CLUBMAN .

IMPORTANT: The brake pad wear sensor must be replaced once it has been removed (brake pad wear sensor loses its retention capability in the brake 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!

Necessary preliminary tasks:

Remove wheels.
Remove brake pad wear sensor .

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!

Unscrew guide bolts (1).

If necessary, grip at hexagon head (2).

Installation:

Replace guide screws.

Tightening torque. See 34 21 3AZ. .

Fig 1: Identifying Hexagon Head And Guide Bolts

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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.

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

Observe minimum thickness of brake pads. See BRAKES - TECHNICAL DATA -- CLUBMAN .

Clean brake pads.

Do not apply grease to brake pad backplate.

Fig 2: Removing Brake Pads

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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.

New brake pads may only be installed if the brake disc thickness is greater than or equal to the minimum brake disc thickness (MIN TH). See BRAKES - TECHNICAL DATA -- CLUBMAN .

NOTE: The minimum thickness of the brake disc is designed so that it holds over the service life of a further set of brake pads if it is greater than or equal to the minimum brake disc thickness (MIN TH). See BRAKES - TECHNICAL DATA -- CLUBMAN .

Fig 3: Identifying Special Tool (34 1 280)

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

Insert brake piston into brake caliper with special tools 34 6 309 , 34 6 306 , 34 6 307 , 34 6 308.

Fig 4: Inserting Brake Piston Into Brake Caliper With Special Tools (34 6 309), (34 6 306), (34 6 307) And (34 6 308)

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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 renew if necessary.

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

Fig 5: Identifying Contact Surface Of Brake Piston

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

Fig 6: 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 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 7: Identifying Guide Surface For Brake Pads

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

Fig 8: Identifying Paste Application Area

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

Fig 9: Identifying Brake Pad With Indentation

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IMPORTANT: After completing work:

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.
Fully depress brake pedal several times so that brake pads contact brake discs.
If necessary, when replacing pads, reset CBS display in accordance with factory specification.

Replacement:

Remove pad retaining springs (1).

Installation:

Clean contact face of brake carrier and apply a thin coating of anti-squeak compound.

Fig 10: Identifying Pad Retaining Springs

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