The picture
Fiesta St Performance Ed Turbo: a strong MOT record by UK norms
Across 630 MOT tests, the Fiesta St Performance Ed Turbo returns 91.1% first-time pass — comfortably ahead of the UK fleet average. The single most-logged Major fail is tyre tread under the limit. Lambda coefficient outside the default limits and emissions levels exceed default limits round out the top three. Average tested mileage sits at 21,169, which is the lens to read those failure rankings through. If you own one and the next test is close, the ranked list below is a sensible pre-test checklist.
Top ten reasons for rejection.
- 01
Tyre tread depth not in accordance with the requirements
15 occurrences · 2.4% of tests
- 02
Lambda coefficient outside the default limits or the range specified by the manufacturer
7 occurrences · 1.1% of tests
- 03
Emissions levels exceed default limits
4 occurrences · 0.6% of tests
- 04
Emissions test unable to be completed
4 occurrences · 0.6% of tests
- 05
a brake lining or pad worn below 1.5mm
3 occurrences · 0.5% of tests
- 06
A tyre seriously damaged
3 occurrences · 0.5% of tests
- 07
A tyre cords visible or damaged
3 occurrences · 0.5% of tests
- 08
A tyre pressure monitoring system malfunctioning or obviously inoperative
3 occurrences · 0.5% of tests
- 09
Number plate does not conform to the specified requirements
2 occurrences · 0.3% of tests
- 10
Brake disc or drum significantly and obviously worn
2 occurrences · 0.3% of tests
Counts cover Major and Dangerous defects logged at test. Advisory items excluded so this shows why a car was rejected, not just what the tester flagged in passing.
Worst-case fix budget · top 2 failures
£140–£255
If every one of this Fiesta ST Performance ED Turbo's most-logged Major fails hit at the same MOT, that's the real-world UK garage range. Reality is usually one or two items, not all of them. Open the estimator →
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Tools that pre-empt a retest.
Picked against this car's top failure patterns. Affiliate links to Amazon UK — we earn a small cut at no cost to you. Disclosed up-front, doesn't shape the data.
Item 01 · Amazon UK
Digital tyre-tread depth gauge
Five quid for a gauge beats £150 for a retest. UK MOT minimum is 1.6mm — most testers fail anything below 2mm to be safe.
Search Amazon UK
Item 02 · Amazon UK
Brake pad measurement gauge
Testers fail pads under 1.5mm. A wear gauge tells you if you've got two months left or two weeks.
Search Amazon UK
Buying or keeping a Fiesta ST Performance ED Turbo?
Use the failure ranking as a pre-test checklist or a haggling lever. Treat the headline pass rate as a fleet-wide trend, not a guarantee on any individual car.
If you own a Fiesta ST Performance ED Turbo and your last MOT looked nothing like the ranked failures above, that's normal — individual cars vary widely. The ranking shows the patterns testers flag most often across the country.