Triumph
Stag
1,586 MOT tests analysed. sits above the UK fleet average — here's where Stags pass, fail, and end up on the retest sheet.
That's 3.6 points above the UK fleet average across our 1,984 tracked models — a confident result.
Pass
81.1%
Pass-after-fix
2.5%
Fail
15.1%
Avg miles
50,779
Pass + Pass-after-fix + Fail = 100%
This model's production run straddles the January 2006 Euro 4 cutoff. Individual cars vary — check your registration plate on the government's ULEZ checker. Daily charges if driven in the zone: London £12.50 · Birmingham £8.00 .
The picture
Stag: above-average pass rates, with caveats
Across 1,126 MOT tests, the Stag returns 81.3% first-time pass — above the UK fleet average. The single most-logged Major fail is windscreen washers not working. Direction indicator lamp missing and a torn suspension dust cover round out the top three. Average tested mileage sits at 52,925, 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.
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- 01
Steering rack gaiter or ball joint dust cover damaged or deteriorated
30 occurrences · 1.9% of tests
- 02
Windscreen washers not working or not providing sufficient fluid to clear the windscreen
30 occurrences · 1.9% of tests
- 03
The strength or continuity of the load bearing structure within 30cm of any sub-frame, spring or suspension component mounting (a 'prescribed area') is significantly reduced or inadequately repaired
30 occurrences · 1.9% of tests
- 04
Body, cab or chassis excessively corroded at a mounting point
26 occurrences · 1.6% of tests
- 05
Significant brake effort recorded with no brake applied indicating a binding brake
23 occurrences · 1.5% of tests
- 06
Emissions levels exceed default limits
23 occurrences · 1.5% of tests
- 07
Steering rack gaiter or ball joint dust cover damaged or deteriorated
21 occurrences · 1.3% of tests
- 08
Brakes imbalance across an axle such that the braking effort from any wheel is less than 70% of the maximum effort recorded from the other wheel on the same axle.
18 occurrences · 1.1% of tests
- 09
A suspension joint dust cover severely deteriorated
17 occurrences · 1.1% of tests
- 10
A direction indicator lamp missing, inoperative or in the case of a multiple light source more than 1/2 not functioning
17 occurrences · 1.1% 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.
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Buying or keeping a Stag?
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 Stag 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.