What brakes do
Your braking system is your car’s main safety system. It slows the vehicle by converting motion into heat using friction at the wheels, so you can stop smoothly and in control.
How brakes work (simple)
- You press the pedal — the brake booster helps multiply your input.
- Hydraulic pressure builds — the master cylinder pushes brake fluid through the lines.
- Friction is applied — the caliper squeezes the pads onto the disc (or shoes press out inside a drum).
- The car slows — friction reduces wheel speed and the ABS system helps prevent wheel lock-up during heavy braking.
What we check at Peak MOT
- Brake pad thickness and wear pattern
- Disc condition (lip, corrosion, cracking, scoring)
- Calipers & sliders for binding, uneven wear and leaks
- Brake fluid level and condition (moisture/contamination)
- Brake hoses and pipes for corrosion, swelling or leaks
- Handbrake operation and rear brake balance
- Road test (where appropriate) for pulling, vibration, noise and pedal feel
Common warning signs
- Squealing or grinding noises
- Steering wheel wobble under braking
- Car pulling left/right
- Vibration through the pedal
- Soft/spongy pedal or pedal sinking
- Burning smell or a hot wheel (possible binding)
- ABS / brake warning light
- Handbrake travel increasing
How brakes are tested on an MOT
On the MOT brake test we assess overall braking efficiency, left-to-right imbalance, and handbrake performance. We’ll also check visible components like discs, pads, hoses and pipes where possible. A car can still pass while components are approaching the wear limit — so a proper inspection is always worth doing if you’re unsure.
How long does it take?
- Visual brake inspection: 15–30 minutes
- Pads/discs replacement (typical): 1–2 hours per axle (vehicle dependent)
- Brake fluid change (typical): 30–60 minutes
Tip: Parts prices vary a lot by model. If you send your registration, we can quote accurately.