Blog

Used car research

Deep dives into our own data for people buying a used car in the UK. Each article states its method, sample sizes and caveats, and every figure can be regenerated from the published data.

5 October 2026The most and least reliable used cars, by MOT pass rateWe compared 119 car models across 33.8 million MOT tests at the same ages. The Porsche 911 passed most often, the Renault Clio least. Full rankings, method and caveats.

More from RegTail

MOT pass rates by model MOT failures explained Buyer guides

Check a specific car

Enter the registration to see that car's MOT history, mileage record and current condition, free. You can also paste an advert link or use a photo on the home page.