The top 10 in this list, model by model
1 · 49% fewer MOT fails
Audi S3
Why it ranks here: 49% fewer MOT fails than cars the same age and mileage (ratio 0.51, 95% CI 0.47–0.55), from 3,629 MOT tests at 9 to 11 years. At typical mileage its rate would be about 15.3% (14.1%–16.4%), against 29.9% for all cars at the same ages; raw (its own ages and mileage) 15.6%. Rank range 1–1.
Check before you buy: no part fails significantly more often than on cars the same age (ages 3 to 15).
Suits: buyers looking at a family hatchback; the ones tested were mostly petrol.
2 · 41% fewer MOT fails
Lexus CT
Why it ranks here: 41% fewer MOT fails than cars the same age and mileage (ratio 0.59, 95% CI 0.58–0.60), from 69,646 MOT tests at 8 to 12 years. At typical mileage its rate would be about 17.3% (17.1%–17.6%), against 29.5% for all cars at the same ages; raw (its own ages and mileage) 17.7%. Rank range 2–2.
Check before you buy: no part fails significantly more often than on cars the same age (ages 3 to 15).
Suits: buyers looking at a family hatchback; the ones tested were mostly hybrid.
3 · 31% fewer MOT fails
Toyota Prius
Why it ranks here: 31% fewer MOT fails than cars the same age and mileage (ratio 0.69, 95% CI 0.69–0.70), from 215,009 MOT tests at 8 to 12 years. At typical mileage its rate would be about 19.8% (19.6%–19.9%), against 28.6% for all cars at the same ages; raw (its own ages and mileage) 21.8%. Rank range 3–3.
Check before you buy: fails on road wheels 1.3–1.4× as often as cars the same age (2,540 fails in 547,101 MOT tests at ages 3 to 15, not mileage-adjusted).
Suits: buyers looking at a family hatchback; the ones tested were mostly hybrid.
4 · 26% fewer MOT fails
Volkswagen Golf
Why it ranks here: 26% fewer MOT fails than cars the same age and mileage (ratio 0.74, 95% CI 0.73–0.74), from 1,197,047 MOT tests at 8 to 12 years. At typical mileage its rate would be about 21.4% (21.4%–21.5%), against 29.1% for all cars at the same ages; raw (its own ages and mileage) 22.4%. Rank range 4–4.
Check before you buy: no part fails significantly more often than on cars the same age (ages 3 to 15).
Suits: buyers looking at a family hatchback; the ones tested were 49% diesel, 49% petrol.
5 · 24% fewer MOT fails
Audi A3
Why it ranks here: 24% fewer MOT fails than cars the same age and mileage (ratio 0.76, 95% CI 0.76–0.76), from 656,985 MOT tests at 8 to 12 years. At typical mileage its rate would be about 21.9% (21.8%–22.0%), against 28.8% for all cars at the same ages; raw (its own ages and mileage) 23.2%. Rank range 5–6.
Check before you buy: fails on seat belts and airbags 1.2–1.3× as often as cars the same age (11,889 fails in 1,469,160 MOT tests at ages 3 to 15, not mileage-adjusted).
Suits: buyers looking at a family hatchback; the ones tested were 50% diesel, 49% petrol.
6 · About average
Honda Insight (first used from 2009)
Why it ranks here: No clear difference from cars the same age and mileage by our 20% rule (ratio 0.76, 95% CI 0.74–0.79), from 12,448 MOT tests at 10 to 12 years. At typical mileage its rate would be about 26.6% (25.8%–27.3%), against 34.8% for all cars at the same ages; raw (its own ages and mileage) 27.4%. Rank range 5–7.
Check before you buy: no part fails significantly more often than on cars the same age (ages 3 to 15).
Suits: buyers looking at a family hatchback; the ones tested were 45% hybrid, 29% unknown; this row covers cars first used from 2009.
7 · 21% fewer MOT fails
Skoda Octavia
Why it ranks here: 21% fewer MOT fails than cars the same age and mileage (ratio 0.79, 95% CI 0.79–0.80), from 297,126 MOT tests at 8 to 12 years. At typical mileage its rate would be about 22.6% (22.4%–22.7%), against 28.6% for all cars at the same ages; raw (its own ages and mileage) 24.6%. Rank range 6–9.
Check before you buy: fails on seat belts and airbags 1.2–1.3× as often as cars the same age (5,402 fails in 727,126 MOT tests at ages 3 to 15, not mileage-adjusted).
Suits: buyers looking at a family hatchback; the ones tested were 64% diesel, 35% petrol.
8 · About average
SEAT Leon
Why it ranks here: No clear difference from cars the same age and mileage by our 20% rule (ratio 0.79, 95% CI 0.79–0.80), from 270,602 MOT tests at 8 to 12 years. At typical mileage its rate would be about 22.5% (22.4%–22.7%), against 28.3% for all cars at the same ages; raw (its own ages and mileage) 24.2%. Rank range 7–9.
Check before you buy: no part fails significantly more often than on cars the same age (ages 3 to 15).
Suits: buyers looking at a family hatchback; the ones tested were 56% petrol, 42% diesel.
9 · About average
BMW 2 Series
Why it ranks here: No clear difference from cars the same age and mileage by our 20% rule (ratio 0.80, 95% CI 0.79–0.81), from 132,314 MOT tests at 8 to 11 years. At typical mileage its rate would be about 19.6% (19.4%–19.9%), against 24.6% for all cars at the same ages; raw (its own ages and mileage) 19.8%. Rank range 7–9.
Check before you buy: fails on road wheels 2.5–2.7× as often as cars the same age (3,100 fails in 478,855 MOT tests at ages 3 to 15, not mileage-adjusted).
Suits: buyers looking at a family hatchback; the ones tested were 57% petrol, 39% diesel.
10 · About average
Toyota Auris
Why it ranks here: No clear difference from cars the same age and mileage by our 20% rule (ratio 0.82, 95% CI 0.81–0.82), from 276,840 MOT tests at 8 to 12 years. At typical mileage its rate would be about 23.4% (23.3%–23.6%), against 28.7% for all cars at the same ages; raw (its own ages and mileage) 23.6%. Rank range 10–11.
Check before you buy: fails on lights and electrics 1.2–1.3× as often as cars the same age (72,065 fails in 560,066 MOT tests at ages 3 to 15, not mileage-adjusted).
Suits: buyers looking at a family hatchback; the ones tested were 45% petrol, 43% hybrid.
How we rank
8,932,820 MOT tests from 2022–2025 of cars 8 to 12 years old. For each model and age, the tests are split into 6 mileage bands (<30k, 30-60k, 60-90k, 90-120k, 120-150k, 150k+); the expected fails are what all cars of that age would fail in the same bands, corrected to the model's own mix of test years. The ratio of the model's fails to the expected fails sets its place. The adjusted rate is that ratio times the all-car rate at the model's own ages, so it reads against that rate: a model tested only at 3 to 5 years is compared with young cars, not with this list's average.
The 95% intervals cover sampling error only (Wilson intervals). A model is called fewer or more only when its interval is at least 20% from the all-car rate, overall and at 3 or more ages ("close to average" when the interval excludes the all-car rate by less); awards use the same rule. Test years: Each model's expected fails therefore use its own mix of test years 2022–2025, age by age; the mileage bands themselves pool the four years, which can leave a small bias in favour of models first sold late in the window. Generations of a model are pooled unless the data splits them; each row says which years it covers. How we compare
Limitation: MOT tests record roadworthiness defects on the test day. They do not record breakdowns, engine or gearbox faults, or repair costs, and they cannot separate design from upkeep: a model whose owners service it before every MOT looks better here. Only cars still on the road are tested.