BMW
645
3,702 MOT tests analysed. lands in the middle of the pack — here's where 645s pass, fail, and end up on the retest sheet.
That's 1.6 points above the UK fleet average across our 1,984 tracked models — a confident result.
Pass
79.1%
Pass-after-fix
5.0%
Fail
15.0%
Avg miles
104,887
Pass + Pass-after-fix + Fail = 100%
This model's production run straddles the January 2006 Euro 4 cutoff. Individual cars vary — check your registration plate on the government's ULEZ checker. Daily charges if driven in the zone: London £12.50 · Birmingham £8.00 .
The picture
645: middle-of-the-pack on first-time pass
Across 2,202 MOT tests, the 645 returns 74.5% first-time pass — below the UK fleet average. The single most-logged Major fail is a broken or weak spring. A missing suspension dust cover and a corroded brake pipe round out the top three. Average tested mileage sits at 104,606, 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
Group 40–50
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 →
40–50
out of 50
Top ten reasons for rejection.
Filter failures:
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- 01
A spring or spring component fractured or seriously weakened
93 occurrences · 2.5% of tests
- 02
A suspension joint dust cover severely deteriorated
83 occurrences · 2.2% of tests
- 03
A suspension pin, bush or joint excessively worn
81 occurrences · 2.2% of tests
- 04
Brake pipe damaged or excessively corroded
60 occurrences · 1.6% of tests
- 05
A suspension pin, bush or joint excessively worn
57 occurrences · 1.5% of tests
- 06
Windscreen or window damaged or seriously discoloured but not adversely affecting driver's view
54 occurrences · 1.5% of tests
- 07
A suspension joint dust cover missing or no longer prevents the ingress of dirt etc
53 occurrences · 1.4% of tests
- 08
Engine MIL illuminated indicating a malfunction
51 occurrences · 1.4% of tests
- 09
A suspension joint dust cover severely deteriorated
51 occurrences · 1.4% of tests
- 10
A lamp missing, inoperative or in the case of a multiple light source more than 1/2 not functioning
51 occurrences · 1.4% 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 5 failures
£360–£1050
If every one of this 645'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.
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Buying or keeping a 645?
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 645 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.