Mazda
1,510 MOT tests analysed. sits above the UK fleet average — here's where CX 30 GT Sport Tech Mhev Autos pass, fail, and end up on the retest sheet.
That's 14.7 points above the UK fleet average across our 1,984 tracked models — a confident result.
Pass
92.2%
Pass-after-fix
2.3%
Fail
5.3%
Avg miles
22,918
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 · 1,510 tests
Pass rate climbs 5.0 points across the cohorts — newer CX 30 GT Sport Tech Mhev Auto examples clear the test more reliably than the early cars.
Pass
89.8%
Fail
6.3%
PRS
3.6%
Avg mileage at test
24,239 mi
Pass
94.8%
Fail
4.2%
PRS
0.8%
Avg mileage at test
21,454 mi
Cohort = vehicle's first-registration year band. Same model, different generations of build.
The picture
Across 509 MOT tests, the Cx-30 Gt Sport Tech Mhev Auto returns 94.1% first-time pass — comfortably ahead of the UK fleet average. The single most-logged Major fail is a seriously damaged tyre. Windscreen damage and the engine warning light staying lit round out the top three. Average tested mileage sits at 18,849, 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.
ABI Insurance Group
Around the UK fleet average for insurance cost. Lower groups cost less to insure; UK fleet average is around Group 22.
Source: ABI Group Rating Panel · administered by Thatcham Research · groups cover standard variants; performance trims may sit higher. Browse all insurance groups →
18–26
out of 50
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A tyre seriously damaged
25 occurrences · 1.7% of tests
Wiper blade defective
9 occurrences · 0.6% of tests
Windscreen or window damaged or seriously discoloured but not adversely affecting driver's view
9 occurrences · 0.6% of tests
a brake lining or pad worn below 1.5mm
7 occurrences · 0.5% of tests
A shock absorber damaged to the extent that it does not function or showing signs of severe leakage
4 occurrences · 0.3% of tests
A tyre seriously damaged
4 occurrences · 0.3% of tests
Wiper blade missing or obviously not clearing the windscreen
4 occurrences · 0.3% of tests
A tyre cords visible or damaged
4 occurrences · 0.3% of tests
Obligatory mirror or device slightly damaged or loose
3 occurrences · 0.2% of tests
Brake disc or drum significantly and obviously worn
3 occurrences · 0.2% 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
£100–£205
If every one of this CX 30 GT Sport Tech 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 5.0-point gap between bands means the year you buy Mazda CX 30 GT Sport Tech Mhev Auto has a real effect on what turns up at the garage.
Best band to buy
94.8%
2021+ registration
the 2021-on band climbs to 94.8% — a 5.0-point improvement. Failures here are mostly wear items: has a cut in excess of the…, damaged but not adversely affecting driver's view — 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
89.8%
2018–2020 registration
On the 2018–2020 band, the data shows a 89.8% pass rate against a fleet average of 94.8% on the newer band. The main culprits logged at test: has a cut in excess of the…, blade defective, and damaged but not adversely affecting driver's view. Average mileage on test for this band is 24,239 miles — high-mileage wear items are a recurring theme.
Best band to buy: 2021+ (94.8% first-time pass). Worst band to avoid: 2018-2020 (89.8% pass). That's a 5.0-point spread across 794 older tests and 716 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
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
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
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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 GT Sport Tech 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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