No. 01 most-tested 1,761,562
Ford
Fiesta
Pass rate
72.3%
UK MOT · 2025 data
Will your car pass its MOT?
And what will it cost if it doesn't? Independent UK car-buyer's guide. Pass rates, real failure reasons, retest budgets — without the dealer spin.
UK fleet pass rate
75.7%
First-time pass across every tracked make and model last year. Roughly 24.3% ended in a fail or retest.
Top-five reasons UK cars failed last year
- 01Number-plate lamp out
- 02Windscreen damage
- 03Tyre tread under limit
- 04Spring fractured or weak
- 05Suspension bush worn
The most-tested
Seven cars, seven stories.
#1 failure reason — last year
A rear registration plate lamp or light source missing or inoperative in the case of multiple lamps or light sources
Found on 1,246,695 cars across 902 tracked models. More than any other single defect on the 2023 MOT register.
Models most at risk →Quick stats
- Total occurrences
- 1,246,695
- Models affected
- 902
- Reference code
- RFR #31084
What MOTCost is
Data first. Ads never first.
MOTCost is a research directory, not a repair network. No quote forms, no "get a price" upsells, no auto-play video. The data is the product.
When a page links out — say, to a recommended tread gauge or a garage directory — that link is flagged as affiliate. Affiliate revenue keeps the site free to read; it never shapes what the numbers say.