Motor Vehicle Expert
MOT brake guide

Car Fails MOT on Brakes

If your car fails its MOT on brakes, it usually means the braking system is worn, damaged, leaking or not performing safely. Brake failures are common and often repairable quickly.

Quick answer Common reasons

Quick answer

Brake defects can range from worn pads to seized calipers, leaking pipes or poor brake balance on the tester.

Some fixes are simple. Others require urgent repairs.

Common reasons a car fails MOT on brakes

Worn brake pads

Pads below safe thickness.

Damaged discs

Scored or heavily worn discs.

Brake imbalance

Uneven braking force.

Fluid leaks

Hydraulic leaks reduce safety.

Handbrake weak

Parking brake not holding.

Warning light on

ABS or brake warning lamp active.

Likely UK repair costs

  • 1Brake pads: often lower-cost repair
  • 2Pads and discs: mid-range repair
  • 3Caliper replacement: higher cost
  • 4Brake pipes: varies by corrosion and labour
  • 5ABS faults: depends on diagnosis

Can you still drive after failing?

If brakes are unsafe, do not drive the vehicle except where legally permitted and safe to do so. Serious brake defects should be repaired immediately.