BMW
9,831 MOT tests analysed. sits above the UK fleet average — here's where 125s pass, fail, and end up on the retest sheet.
That's 7.1 points above the UK fleet average across our 1,984 tracked models — a confident result.
Pass
84.7%
Pass-after-fix
3.2%
Fail
11.8%
Avg miles
82,637
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 · 9,831 tests
Pass rate climbs 4.9 points across the cohorts — newer 125 examples clear the test more reliably than the early cars.
Pass
84.6%
Fail
11.8%
PRS
3.2%
Avg mileage at test
83,247 mi
Pass
89.5%
Fail
7.9%
PRS
1.6%
Avg mileage at test
51,496 mi
Cohort = vehicle's first-registration year band. Same model, different generations of build.
The picture
Across 5,304 MOT tests, the 125 returns 81.6% first-time pass — above the UK fleet average. The single most-logged Major fail is windscreen damage. A seriously damaged tyre and tyre tread under the limit round out the top three. Average tested mileage sits at 76,065, 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
Above average — worth comparing quotes before buying. 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 →
26–44
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Windscreen or window damaged or seriously discoloured but not adversely affecting driver's view
217 occurrences · 2.2% of tests
Tyre tread depth not in accordance with the requirements
150 occurrences · 1.5% of tests
A shock absorber damaged to the extent that it does not function or showing signs of severe leakage
150 occurrences · 1.5% of tests
A tyre seriously damaged
127 occurrences · 1.3% of tests
A rear registration plate lamp or light source missing or inoperative in the case of multiple lamps or light sources
102 occurrences · 1.0% of tests
A tyre cords visible or damaged
91 occurrences · 0.9% of tests
A tyre seriously damaged
89 occurrences · 0.9% of tests
a brake lining or pad worn below 1.5mm
69 occurrences · 0.7% of tests
A suspension pin, bush or joint excessively worn
65 occurrences · 0.7% of tests
Wiper blade defective
47 occurrences · 0.5% 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
£68–£130
If every one of this 125'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. A 4.9-point gap between bands means the year you buy BMW 125 has a real effect on what turns up at the garage.
Best band to buy
89.5%
2018–2020 registration
the 2018–2020 band climbs to 89.5% — a 4.9-point improvement. Tests in this band average 51,496 miles — roughly 32K miles fewer on the clock than the older band. Failures here are mostly wear items: has ply or cords exposed, 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. The stricter post-2018 MOT test rules meant manufacturers had to tighten up emissions and electrical checks, but this band still shows far fewer major failures on suspension and bodywork than the older fleet.
Band to be cautious about
84.6%
Pre-2018 registration
On the older band (pre-2018), the data shows a 84.6% pass rate against a fleet average of 89.5% on the newer band. The main culprits logged at test: damaged but not adversely affecting driver's view, has a serious fluid leak, and tread depth below requirements of 1.6mm. Average mileage on test for this band is 83,247 miles — high-mileage wear items are a recurring theme.
Best band to buy: 2018-2020 (89.5% first-time pass). Worst band to avoid: pre-2018 (84.6% pass). That's a 4.9-point spread across 9,641 older tests and 190 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
H7 / W21W bulb pack
A spare-bulb kit lives in the boot. Test morning is not the time to find your stop-lamp's gone.
Search Amazon UK
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Click Mechanic · 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 125 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.
