Photo: Vauxford, CC BY-SA 4.0
BMW
M4 Competition Auto
2,492 MOT tests analysed. sits above the UK fleet average — here's where M4 Competition Autos pass, fail, and end up on the retest sheet.
That's 17.7 points above the UK fleet average across our 1,984 tracked models — a confident result.
Pass
95.2%
Pass-after-fix
0.7%
Fail
3.8%
Avg miles
20,815
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.
The picture
M4 Competition Auto: a strong MOT record by UK norms
Across 2,492 MOT tests, the M4 Competition Auto returns 95.2% first-time pass — comfortably ahead of the UK fleet average. The single most-logged Major fail is a tyre with the cords showing. Windscreen damage and a non-conforming number plate round out the top three. Average tested mileage sits at 20,815, 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.
Top ten reasons for rejection.
Filter failures:
Hide categories
Tick a category to hide it from rankings sitewide. Saved in this browser only.
- 01
A tyre cords visible or damaged
27 occurrences · 1.1% of tests
- 02
Windscreen or window damaged or seriously discoloured but not adversely affecting driver's view
26 occurrences · 1.0% of tests
- 03
Number plate does not conform to the specified requirements
18 occurrences · 0.7% of tests
- 04
A tyre seriously damaged
14 occurrences · 0.6% of tests
- 05
Tyre tread depth not in accordance with the requirements
14 occurrences · 0.6% of tests
- 06
Lamp emitted colour, position or intensity not in accordance with the requirements
9 occurrences · 0.4% of tests
- 07
Number plate showing an incorrect registration
8 occurrences · 0.3% of tests
- 08
Windscreen or window excessively tinted but not adversely affecting driver's view
8 occurrences · 0.3% of tests
- 09
Lamp emitted colour, position or intensity not in accordance with the requirements
8 occurrences · 0.3% of tests
- 10
A tyre seriously damaged
5 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 3 failures
£135–£225
If every one of this M4 Competition 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.
Tools that pre-empt a retest.
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
MOT-spec replacement number plate
Faded or non-standard plates fail outright. Replacements take ten minutes online with V5C details.
Search Amazon UK
My Motor World · affiliate
Parts & supplies for this fix
Affiliate links — small commission, no extra cost to you.
Summit
Summit ADRG-640 BMW Replacement Stick-On Tinted Mirror Glass LHS
£10.99
View at My Motor World →
Summit
Summit ADRG-904 BMW Replacement Stick-On Tinted Mirror Glass RHS
£10.99
View at My Motor World →
Summit
Summit ADRG-905 BMW Replacement Stick-On Tinted Mirror Glass LHS
£10.99
View at My Motor World →
Draper Expert
Draper Expert Oil Filter Socket for Audi, BMW, Mercedes-Benz, Porsche and VW
£18.69
View at My Motor World →
Click Mechanic · affiliate
Book a mobile mechanic
Affiliate links — small commission, no extra cost to you.
Mobile mechanic · UK-wide
Book a mechanic at your door.
Fixed-price quotes upfront. No garage needed. Click Mechanic sends a vetted local mechanic to you — home, work, or roadside.
Owner reports · Honest John
What owners actually report.
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
The long history of impressive high performance coupes continues with the latest iteration of the BMW M4. Staggeringly fast with pin-sharp handling, the BMW M4 still manages to be usable and comfortable enough to use regularly, with only the painful price tag counting against it.
Where it falls short
Expensive to buy and run. Less exciting at lower speeds. Divisive looks.
Buying or keeping an M4 Competition Auto?
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 M4 Competition 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.