Triumph
1,572 MOT tests analysed. sits above the UK fleet average — here's where Street Triple RSs pass, fail, and end up on the retest sheet.
That's 14.4 points above the UK fleet average across our 1,984 tracked models — a confident result.
Pass
91.9%
Pass-after-fix
3.9%
Fail
3.9%
Avg miles
6,517
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 · 1,548 tests
Pass rate is broadly flat across the cohorts — new and old Street Triple RS examples track each other at the test bay.
Pass
91.9%
Fail
3.7%
PRS
4.0%
Avg mileage at test
7,003 mi
Pass
91.8%
Fail
4.4%
PRS
3.8%
Avg mileage at test
5,727 mi
Cohort = vehicle's first-registration year band. Same model, different generations of build.
The picture
Across 628 MOT tests, the Street Triple Rs returns 91.4% first-time pass — comfortably ahead of the UK fleet average. The single most-logged Major fail is a non-conforming number plate. A missing rear reflector and rear registration plate lamp throwing direct white round out the top three. Average tested mileage sits at 5,893, 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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Excessive fluctuation in brake effort through each wheel revolution
9 occurrences · 0.6% of tests
Brake lining or pad worn below 1.0mm
9 occurrences · 0.6% of tests
Reflector missing or reflecting white to the rear
7 occurrences · 0.4% of tests
Number plate does not conform to the specified requirements
6 occurrences · 0.4% of tests
Tyre tread depth not in accordance with the requirements
5 occurrences · 0.3% of tests
A rear registration plate lamp throwing direct white light to the rear
5 occurrences · 0.3% of tests
A transmission belt, chain, sprocket or pulley excessively loose or worn
4 occurrences · 0.3% of tests
The aim of a headlamp is not within limits laid down in the requirements
3 occurrences · 0.2% of tests
Stop lamp missing, inoperative or in the case of a multiple light source more than 1/2 not functioning
3 occurrences · 0.2% of tests
A wheel with a loose or missing wheel nut, bolt or stud in the case of a single fixing, or more than one loose or missing in the case of multiple fixings.
2 occurrences · 0.1% 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.
Worst-case fix budget · top 3 failures
£155–£290
If every one of this Street Triple RS'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. Pass rates barely move across bands here, so the year you buy Triumph Street Triple RS makes little measurable difference to MOT outcomes.
Best band to buy
91.9%
2018–2020 registration
the 2018–2020 band climbs to 91.9% — a 0.2-point improvement. Failures here are mostly wear items: less than 1.0 mm thick, throwing direct white light to the rear — the structural issues that drag down older examples don't appear in the top-10 for this band.
Band to be cautious about
91.8%
2021+ registration
On the 2021-on band, the data shows a 91.8% pass rate against a fleet average of 91.9% on the newer band. The main culprits logged at test: missing, indicates excessive fluctuation of brake effort, and less than 1.0 mm thick. Average mileage on test for this band is 5,727 miles — high-mileage wear items are a recurring theme.
Best band to buy: 2018-2020 (91.9% first-time pass). Worst band to avoid: 2021+ (91.8% pass). That's a 0.2-point spread across 680 older tests and 868 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
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
Item 02 · Amazon UK
MOT-spec replacement number plate
Faded or non-standard plates fail outright. Replacements take ten minutes online with V5C details.
Search Amazon UK
Item 03 · 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
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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Fixed-price quotes upfront. No garage needed. Click Mechanic sends a vetted local mechanic to you — home, work, or roadside.
Recall history
The Street Triple RS has 2 official UK vehicle recalls covering defect details, remedies, and affected build dates.
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 RS 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.
