Most reliable sports cars: 2024 MOT ranking
Figures updated
The Porsche 911 is the most reliable sports car in DVSA's 2024 MOT results, with a reliability score of 261 (100 is average for a car of the same age and mileage): it is 62% less likely to fail than the average car of the same age and mileage. Next come the Porsche Boxster (216) and the BMW Z4 (144). The least reliable is the Volkswagen Scirocco (110).
Across the 7 sports cars we rank, 22.7% of 357,188 MOT tests ended in a first-time fail, against 28.5% for all cars.
Sports cars ranked by MOT reliability
| # | Model | Score | Failed first time | At 3 years | Tests |
|---|---|---|---|---|---|
| 1 | Porsche 911 | 261 | 10.0% | 5.5% | 34,721 |
| 2 | Porsche Boxster | 216 | 13.8% | 4.0% | 22,735 |
| 3 | BMW Z4 | 144 | 22.8% | 9.7% | 34,006 |
| 4 | Audi TT | 141 | 22.5% | 9.7% | 101,374 |
| 5 | Mazda MX-5 | 125 | 23.3% | 5.7% | 70,793 |
| 6 | Mercedes-Benz SLK | 121 | 27.5% | – | 46,780 |
| 7 | Volkswagen Scirocco | 110 | 31.1% | – | 46,779 |
Every version of each model tested in 2024, aged 3 to 20. Models with fewer than 10,000 tests are left out. How the score works.
Most reliable cars by type
Frequently asked questions
›What is the most reliable sports car?
The Porsche 911, going by 2024 MOT results: it scored 261 in our MOT Reliability League, where 100 is average for a car of the same age and mileage, and 10.0% failed their MOT first time.
›What is the least reliable sports car?
The Volkswagen Scirocco, with a score of 110. 31.1% failed their MOT first time, against 22.7% for sports cars as a whole.
›How do you measure reliability?
From every MOT test DVSA published for 2024. Older, higher-mileage cars fail more, so each model is compared with cars of the same age and mileage: a score of 125 means it fails a fifth less often than expected, and 80 means a quarter more often.
Source: DVSA anonymised MOT tests 2024, Open Government Licence v3.0. Classes are our own grouping.