Performance by cohort

3 year bands · 385,550 tests

Pass rate climbs 7.1 points across the cohorts — newer Cooper examples clear the test more reliably than the early cars.

Pre-2018 cohort 227,141

Pass

84.5%

Fail

11.1%

PRS

4.0%

Avg mileage at test

57,085 mi

2018–2020 cohort 123,754

Pass

89.7%

Fail

7.2%

PRS

2.8%

Avg mileage at test

30,741 mi

2021+ cohort 34,655

Pass

91.7%

Fail

5.8%

PRS

2.1%

Avg mileage at test

20,328 mi

Cohort = vehicle's first-registration year band. Same model, different generations of build.

Generations on file · 5

Mini Cooper · UK market

Photos: Wikimedia Commons · CC BY-SA / CC BY / public domain.

The picture

MINI Cooper Tops 86% — Wiper Blades Catch Owners Out

A 86.06% pass rate across 220,171 MOT tests puts the MINI Cooper among the best in the small hatchback class. Windscreen damage and wiper blade condition account for two of the three main failure reasons — simple items, but ones that trip up owners who don't notice deterioration between tests. Average test mileage is just 41,572, meaning most of the fleet is still relatively young. Bigger concerns surface at higher miles: a porous cylinder head on a 2008 Cooper accumulated £3,000 in repair costs by 57,000 miles, and timing chain issues on the R56 have been quoted at £1,900. Check wiper blades before presenting for test and ask about timing chain history on R56-generation cars.

ABI Insurance Group

Group 18–30

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 →

18–30

out of 50

Compare quotes →

Top ten reasons for rejection.

Filter failures:

Hide wear items to see the model's real defects.

01

Windscreen or window damaged or seriously discoloured but not adversely affecting driver's view

8,552 occurrences · 2.2% of tests
02

Wiper blade missing or obviously not clearing the windscreen

5,306 occurrences · 1.4% of tests
03

Wiper blade defective

5,059 occurrences · 1.3% of tests
04

A tyre seriously damaged

5,038 occurrences · 1.3% of tests
05

Tyre tread depth not in accordance with the requirements

4,174 occurrences · 1.1% of tests
06

a brake lining or pad worn below 1.5mm

2,938 occurrences · 0.8% of tests
07

A tyre cords visible or damaged

2,353 occurrences · 0.6% of tests
08

A tyre seriously damaged

2,237 occurrences · 0.6% of tests
09

A rear registration plate lamp or light source missing or inoperative in the case of multiple lamps or light sources

2,085 occurrences · 0.5% of tests
10

A lamp missing, inoperative or in the case of a multiple light source more than 1/2 not functioning

1,831 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 3 failures

£100–£185

If every one of this Cooper'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

Best year to buy. Worst to avoid.

First-time MOT pass rate split by registration band. A 7.2-point gap between bands means the year you buy Mini Cooper has a real effect on what turns up at the garage.

Best band to buy

91.7%

2021+ registration

the 2021-on band climbs to 91.7% — a 7.2-point improvement. Tests in this band average 20,328 miles — roughly 37K miles fewer on the clock than the older band. 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

84.5%

Pre-2018 registration

On the older band (pre-2018), the data shows a 84.5% pass rate against a fleet average of 91.7% on the newer band. The main culprits logged at test: damaged but not adversely affecting driver's view, tread depth below requirements of 1.6mm, and does not clear the windscreen effectively. Average mileage on test for this band is 57,085 miles — high-mileage wear items are a recurring theme. Honest John records: "Porous cylinder head reported on 2008 MINI Cooper at 57,000 miles. Car has cost £3,000 in repairs over past 3 years. MINI specialist said never saw the condition before and…"

Best band to buy: 2021+ (91.7% first-time pass). Worst band to avoid: pre-2018 (84.5% pass). That's a 7.2-point spread across 227,141 older tests and 34,655 newer ones — year of build makes a material difference on this model.

Year-spread leaderboard →

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

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

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

My Motor World · affiliate

Parts & supplies for this fix

Affiliate links — small commission, no extra cost to you.

Draper

Draper Air Mini Oiler

£16.49

View at My Motor World →

My Motor World

My Mini Mike Air Freshener

£5.49

View at My Motor World →

Hycote

Hycote MINI Chilli Red Double Acrylic Spray Paint 150ml

£6.59

View at My Motor World →

Hycote

Hycote MINI Cosmic Blue Double Acrylic Spray Paint 150ml

£6.59

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.

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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

17-inch wheels with Sport suspension destroy both ride and road feel, air conditioning wasn't standard on models before January 2009.

Recent owner-reported faults

20 Dec 2016
Porous cylinder head reported on 2008 MINI Cooper at 57,000 miles. Car has cost £3,000 in repairs over past 3 years. MINI specialist said never saw the condition before and that car needs a new engine. BMW MINI dealer to conduct diagnostic tests for a manufacturing fault.
18 Oct 2016
Yellow engine EML light came on in 59k mile R56 MINI Cooper S. Garage advised that it needs a new timing chain (which has "jumped a tooth") and a few other parts. Estimated cost £1,900, of which parts are about £1,500, but apparently the replacement parts would not develop the same problem later (ie, the parts have been modified to eliminate (or reduce) this problem).
11 Aug 2016
Report of 17,400 mile 2012 MINI Cooper auto with Pepper pack perpetually stalling and losing power to steering and brakes. Taken to MINI dealer which has had the car for 12 days and cannot find the problem. (Begs the question why not. See above.)
24 Jul 2016
65,000 mile 2009 R57 MINI convertible automatic reported to be using a litre of oil every 1,500 miles.
20 May 2016
As directly above (9-5-2016), engine warning light recently came on in 25k mile 2011 MINI Cooper. Fault was traced to a failed solenoid in the sump, resulting in oil tracking back up the wiring to the engine management system, all of which had to be replaced. MINI and the local MINI dealership dealt with the situation very well. MINI stood the cost of the new EMU, and the dealer significantly reduced his hourly rate. Instead of a bill of £1,800, the reader paid £526. The dealer told him that it was a rare, but not unknown problem. Somewhat friendlier dealer than 9-5-2016.
9 May 2016
Starting problem on December 2010 MINI Cooper S Cabriolet traced to failed oil seal on a solenoid that allowed oil to track along the wiring harness and into the engine management system, both of which had to be replaced, along with re-programming. BMW dealer response was no chance of a contribution to repair costs on a car of that age. Owner opted to have it repaired at local independent MINI specialist. This cost £2,525.
9 Jan 2016
Timing chain failed on used 2009 MINI Cooper S bought 3 months previously.
16 Nov 2015
Rear brake discs of 3 year old 30,000 mile MINI Cooper corroded and MINI lease demanded they were replaced by lessee before returning the car.
3 Aug 2015
Strange case of 3 year old MINI Cooper S failing to start after a recent franchised service. Local mechanic found that CV joint had detached from driveshaft.
21 Jul 2015
Number of problems reported with Cooper S. First, a timing chain failure (often the result of too infrequent oil changes). MINI provided goodwill. Then a coolant leak from a failed header tank (£600), and now another coolant leak at the seal with the oil filter for which the dealer is asking another £600. This could be connected with the electric pump that circulates coolant through the turbo and which was the subject of an NHTSA recall in the USA.
11 Jul 2015
Report of peeling and blistering of clearcoat lacquer on Chilli Red MINI Cooper S.
29 Sep 2014
Another yellow engine light showing on a 2007 MINI Cooper S. Suspect oil/timing chain problems.

Source: honestjohn.co.uk · 30 reports indexed, top 12 shown

Buying or keeping a Cooper?

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 Cooper 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.