BMW
3,358 MOT tests analysed. sits above the UK fleet average — here's where X4 Xdrive20d M Sport Mhev Autos pass, fail, and end up on the retest sheet.
That's 14.0 points above the UK fleet average across our 1,984 tracked models — a confident result.
Pass
91.5%
Pass-after-fix
2.4%
Fail
5.8%
Avg miles
31,687
Pass + Pass-after-fix + Fail = 100%
Electric and hydrogen vehicles are exempt from all UK clean air zone charges.
Performance by cohort
2 year bands · 3,358 tests
Pass rate is broadly flat across the cohorts — new and old X4 Xdrive20d M Sport Mhev Auto examples track each other at the test bay.
Pass
90.8%
Fail
6.1%
PRS
2.8%
Avg mileage at test
38,533 mi
Pass
91.8%
Fail
5.7%
PRS
2.2%
Avg mileage at test
28,981 mi
Cohort = vehicle's first-registration year band. Same model, different generations of build.
The picture
Across 503 MOT tests, the X4 Xdrive20d M Sport Mhev Auto returns 90.1% first-time pass — comfortably ahead of the UK fleet average. The single most-logged Major fail is a seriously damaged tyre. Windscreen damage and tyre tread under the limit round out the top three. Average tested mileage sits at 29,184, 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
A high-group car — insurance costs will be significantly above average. 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 →
35–45
out of 50
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A tyre seriously damaged
59 occurrences · 1.8% of tests
Windscreen or window damaged or seriously discoloured but not adversely affecting driver's view
59 occurrences · 1.8% of tests
A tyre cords visible or damaged
31 occurrences · 0.9% of tests
A direction indicator lamp missing, inoperative or in the case of a multiple light source more than 1/2 not functioning
19 occurrences · 0.6% of tests
Wiper blade defective
19 occurrences · 0.6% of tests
Engine MIL illuminated indicating a malfunction
18 occurrences · 0.5% of tests
Tyre tread depth not in accordance with the requirements
16 occurrences · 0.5% of tests
A tyre seriously damaged
10 occurrences · 0.3% of tests
Engine MIL illuminated indicating a malfunction
10 occurrences · 0.3% of tests
Windscreen washers not working or not providing sufficient fluid to clear the windscreen
7 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
£80–£140
If every one of this X4 Xdrive20d M Sport 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 →
Try the calculator
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 BMW X4 Xdrive20d M Sport Mhev Auto makes little measurable difference to MOT outcomes.
Best band to buy
91.8%
2021+ registration
the 2021-on band climbs to 91.8% — a 1.0-point improvement. Tests in this band average 28,981 miles — roughly 10K miles fewer on the clock than the older band. Failures here are mostly wear items: damaged but not adversely affecting driver's view, has a cut in excess of the… — 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
90.8%
2018–2020 registration
On the 2018–2020 band, the data shows a 90.8% pass rate against a fleet average of 91.8% on the newer band. The main culprits logged at test: has a cut in excess of the…, damaged but not adversely affecting driver's view, and has ply or cords exposed. Average mileage on test for this band is 38,533 miles — high-mileage wear items are a recurring theme.
Best band to buy: 2021+ (91.8% first-time pass). Worst band to avoid: 2018-2020 (90.8% pass). That's a 1.0-point spread across 951 older tests and 2,407 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
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Mobile mechanic · UK-wide
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Owner reports · Honest John
Verbatim faults logged by owners on honestjohn.co.uk over recent years. We didn't summarise — these are the words people typed in.
What's good
Less practical than the equivalent BMW X3 SUV. Quite expensive to buy. Coupe SUV styling remains divisive for many.
Where it falls short
Less practical than the equivalent BMW X3 SUV. Quite expensive to buy. Coupe SUV styling remains divisive for many.
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 an X4 Xdrive20d M Sport 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.
