Triumph
2,267 MOT tests analysed. sits above the UK fleet average — here's where Street Triple Rs pass, fail, and end up on the retest sheet.
That's 10.7 points above the UK fleet average across our 1,984 tracked models — a confident result.
Pass
88.2%
Pass-after-fix
6.1%
Fail
5.6%
Avg miles
16,335
Pass + Pass-after-fix + Fail = 100%
Petrol cars first registered from January 2006 meet Euro 4 — compliant in London ULEZ, Birmingham CAZ, Bristol CAZ, and Glasgow LEZ.
Performance by cohort
2 year bands · 2,172 tests
Pass rate drops 3.3 points across the cohorts — recent Street Triple R examples are doing worse than the early cars at the same tested age.
Pass
88.3%
Fail
6.0%
PRS
5.6%
Avg mileage at test
17,622 mi
Pass
85.1%
Fail
1.3%
PRS
13.0%
Avg mileage at test
5,542 mi
Cohort = vehicle's first-registration year band. Same model, different generations of build.
The picture
Across 1,703 MOT tests, the Street Triple R returns 87.3% first-time pass — comfortably ahead of the UK fleet average. The single most-logged Major fail is tyre tread under the limit. Audible warning not working and a non-conforming number plate round out the top three. Average tested mileage sits at 16,414, 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.
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Tyre tread depth not in accordance with the requirements
13 occurrences · 0.6% of tests
A direction indicator lamp missing, inoperative or in the case of a multiple light source more than 1/2 not functioning
13 occurrences · 0.6% of tests
Audible warning not working
12 occurrences · 0.5% of tests
A shock absorber not functioning or leaking severely
11 occurrences · 0.5% of tests
Brake lining or pad worn below 1.0mm
11 occurrences · 0.5% of tests
Reflector missing or reflecting white to the rear
11 occurrences · 0.5% of tests
A footrest missing or insecure
10 occurrences · 0.4% of tests
Number plate does not conform to the specified requirements
8 occurrences · 0.4% of tests
A lamp not securely attached
8 occurrences · 0.4% of tests
Significant brake effort recorded with no brake applied indicating a binding brake
7 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 Street Triple R'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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Build your own retest budget.
Year-band analysis
First-time MOT pass rate split by registration band. A 3.3-point gap between bands means the year you buy Triumph Street Triple R has a real effect on what turns up at the garage.
Best band to buy
88.3%
Pre-2018 registration
the older band (pre-2018) climbs to 88.3% — a 3.3-point improvement. Failures here are mostly wear items: tread depth is below minimum requirements of 1.0mm, not working — the structural issues that drag down older examples don't appear in the top-10 for this band.
Band to be cautious about
85.1%
2021+ registration
On the 2021-on band, the data shows a 85.1% pass rate against a fleet average of 88.3% on the newer band. The main culprits logged at test: does not conform to the specified requirements, missing, and assorted lighting failures. Average mileage on test for this band is 5,542 miles — high-mileage wear items are a recurring theme.
Best band to buy: pre-2018 (88.3% first-time pass). Worst band to avoid: 2021+ (85.1% pass). That's a 3.3-point spread across 154 older tests and 2,018 newer ones — year of build makes a material difference on this model.
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
My Motor World · affiliate
Affiliate links — small commission, no extra cost to you.
Click Mechanic · affiliate
Affiliate links — small commission, no extra cost to you.
Mobile mechanic · UK-wide
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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 Street Triple R 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.
