Mazda
1,354 MOT tests analysed. sits above the UK fleet average — here's where CX 30 SE L Lux Mhev Autos pass, fail, and end up on the retest sheet.
That's 14.1 points above the UK fleet average across our 1,984 tracked models — a confident result.
Pass
91.7%
Pass-after-fix
2.4%
Fail
5.0%
Avg miles
22,195
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 · 1,354 tests
Pass rate climbs 1.7 points across the cohorts — newer CX 30 SE L Lux Mhev Auto examples clear the test more reliably than the early cars.
Pass
90.5%
Fail
5.0%
PRS
3.6%
Avg mileage at test
24,053 mi
Pass
92.2%
Fail
5.0%
PRS
1.8%
Avg mileage at test
21,291 mi
Cohort = vehicle's first-registration year band. Same model, different generations of build.
The picture
Across 1,354 MOT tests, the Cx-30 Se-L Lux Mhev Auto returns 91.7% first-time pass — comfortably ahead of the UK fleet average. The single most-logged Major fail is windscreen damage. Tyre tread under the limit and a defective wiper blade round out the top three. Average tested mileage sits at 22,195, 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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Windscreen or window damaged or seriously discoloured but not adversely affecting driver's view
21 occurrences · 1.6% of tests
Tyre tread depth not in accordance with the requirements
15 occurrences · 1.1% of tests
Wiper blade defective
14 occurrences · 1.0% of tests
A tyre seriously damaged
9 occurrences · 0.7% of tests
A shock absorber damaged to the extent that it does not function or showing signs of severe leakage
7 occurrences · 0.5% of tests
Wiper blade missing or obviously not clearing the windscreen
5 occurrences · 0.4% of tests
Number plate does not conform to the specified requirements
4 occurrences · 0.3% of tests
Reflector defective or damaged by up to 50% of the reflecting surface
3 occurrences · 0.2% of tests
Parking brake efficiency below minimum requirement
3 occurrences · 0.2% of tests
Brake lining or pad worn down to wear indicator
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 2 failures
£80–£140
If every one of this CX 30 SE L Lux Mhev Auto'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 1.7-point gap between bands is modest — the year you buy Mazda CX 30 SE L Lux Mhev Auto makes a small but real difference to MOT outcomes.
Best band to buy
92.2%
2021+ registration
the 2021-on band climbs to 92.2% — a 1.7-point improvement. Failures here are mostly wear items: blade defective, tread depth below requirements of 1.6mm — the structural issues that drag down older examples don't appear in the top-10 for this band. Post-2020 examples are early in their MOT life and generally show the cleanest records.
Band to be cautious about
90.5%
2018–2020 registration
On the 2018–2020 band, the data shows a 90.5% pass rate against a fleet average of 92.2% on the newer band. The main culprits logged at test: damaged but not adversely affecting driver's view, has a serious fluid leak, and does not clear the windscreen effectively. Average mileage on test for this band is 24,053 miles — high-mileage wear items are a recurring theme.
Best band to buy: 2021+ (92.2% first-time pass). Worst band to avoid: 2018-2020 (90.5% pass). That's a 1.7-point spread across 443 older tests and 911 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
Bosch Aerotwin wiper blades
Cheap wipers fail the test on smear streaks. Bosch Aerotwins last a winter and clear a screen properly.
Search Amazon UK
My Motor World · affiliate
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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 CX 30 SE L Lux Mhev Auto 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.
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