Home Ireland NCT brake fail (imbalance or performance)
Car problem · what to doNCT brake fail (imbalance or performance)
The brake rollers measured weak or uneven braking. It is one of the most common fails and one of the most fixable — calipers, pads, discs and hoses, quoted from your exact fail lines.
What you might be seeing
- Fail sheet cites imbalance %, low efficiency, or handbrake performance
- Car may pull slightly under hard braking
- One wheel dustier or hotter than its pair
The likely causes, honestly ranked
- Sticking caliper or seized slider pins
- Contaminated or glazed pads
- Corroded discs on little-used cars
- Perishing flexi hoses acting as one-way valves
- Handbrake cable adjustment
Do this now
- Photograph the brake section of the fail sheet and send it with your quote request
- Ask for the roller readings to be re-measured after repair — good garages verify, not assume
- Book the retest only after the fix is confirmed
What to avoid
- Pads alone when a caliper is the disease
- Driving hard on a known imbalance in the wet
Who fixes this
Related problems
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Frequently asked questions
What does brake imbalance mean on the NCT sheet?
The two wheels on an axle braked unevenly beyond the allowed percentage — the car wants to pull under braking. Usually one side is under-performing due to a caliper, pad or hose fault.
Why did my handbrake fail?
Cable stretch, adjustment or seized rear mechanisms — common on cars parked in gear with the handbrake unused. Often a small job.
Can any garage do NCT brake repairs?
Yes — brake repair is core garage work; the test centre only tests. Local garages quote from your fail lines and many will re-check balance on their own equipment.
Written and reviewed by the Escargo team · Updated 9 August 2026 · Escargo shows real local businesses only — where none is listed yet, the page says so honestly.