MOT failure · RFR #32129
Brake performance unable to be tested
Total
105
Models
31
Models most at risk.
Ranked by rate, not raw volume. A Fiesta shows every failure a lot because there are a lot of Fiestas. Rate = share of that model's own MOTs.
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- 01 Land Rover Discovery Luxury Hse Sdv6 Auto 0.32%
- 02 Volvo Xc90 R Design Pro B5 Awd Auto 0.30%
- 03 Kia Sportage 3 Crdi Isg Mhev S A 0.26%
- 04 Renault Zoe I Iconic ZE 50 0.24%
- 05 Mercedes Benz V 220 Sport D Auto 0.23%
- 06 Vauxhall Corsa Elite Turbo 0.22%
- 07 Cupra Formentor Vz2 Tsi 4drive S A 0.20%
- 08 Land Rover Discovery Sprt Rdyn SE P300e A 0.20%
- 09 Audi A1 Technik 30 Tfsi 0.20%
- 10 Land Rover R Rover Evoque R Dyn SE Mhev A 0.19%
- 11 Ford Kuga ST Line First Edition 0.19%
- 12 Land Rover R R Evoque R Dyn Hse D Mhev A 0.19%
- 13 Volvo Xc90 Rdesign Pro B5 Mhev Awd A 0.18%
- 14 Land Rover R Rover Sport Hse Dyn Phev A 0.18%
- 15 Land Rover Range Rover Evoque S P300e A 0.16%
- 16 Volvo Xc90 Inscrp Pro T8rchrge Awd A 0.15%
- 17 Ford Puma ST Line Vignale Auto 0.15%
- 18 Volvo Xc60 Momentum D4 Auto 0.14%
- 19 Jaguar E Pace Chequered Flag D Awd A 0.13%
- 20 Volvo Xc60 Edition T4 Auto 0.13%
- 21 Volkswagen Golf Style Tdi S A 0.12%
- 22 Audi Q3 S Line 40 Tfsi Quattro S A 0.12%
- 23 Land Rover RR Sport Hse Dyn Black P400e A 0.11%
- 24 Jaguar E Pace Chequered Flag Awd Auto 0.10%
- 25 Land Rover Range Rover Sport Hse D Mhev A 0.10%
- 26 Suzuki Vitara SZ T Boosterjet Mhev A 0.09%
- 27 Volkswagen T Roc Sel Tsi Evo S A 0.08%
- 28 Audi RS Q8 Vsprung Tfsi Mhev Quat A 0.07%
- 29 Audi E Tron Technik 55 Quattro 0.06%
- 30 Nissan Qashqai Premiere ED Dig T Mhev 0.06%
Top 30 by rate. 1 more models also logged this defect.
Cost orientation
Hard to predict in isolation — depends what's actually worn.
This defect doesn't map to a clean retail-part swap; ranges vary too widely without seeing the car. Use the estimator to bracket the all-in cost across the items most likely to surface alongside it.
Frequently asked.
- Why does brake performance unable to be tested fail an MOT?
- Brake performance unable to be tested. Most commonly flagged on the Land Rover Discovery Luxury Hse Sdv6 Auto. UK MOT standards require this item to meet minimum safety thresholds — when it falls short, the tester logs it as a Major or Dangerous defect and the car fails outright.
- How much does it cost to fix brake performance unable to be tested?
- Costs vary depending on the vehicle, region, and severity. Use our MOT cost estimator for typical UK garage rates across the most common failure items.
Real examples from owners.
Owner reports sourced from honestjohn.co.uk that mention keywords from this failure. Matched, not summarised.
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