2014 MINI One diesel: common problems and MOT failures
What MOT testers find on the diesel MINI One first registered in 2014 (diesel cars only): we looked at the 4,582 MOTs these cars had during 2023–2025. Plus known faults and what to look at before you buy one.
What goes wrong more than usual on a 2014 MINI One diesel?
Parts flagged at MOT more often on the 2014 MINI One diesel than on all cars registered in 2014.
- Engine warning light2.4× usualMINI One3.4% All 2014 cars1.4%
Failed outright at MOT: 3.4%, against 1.4% of all 2014 cars. The rest were advisories or minor defects.
Rough price £10–£80 our estimateAt the viewing: Ask a friend to check every light while you work the switches: indicators, brake lights, fog lights and reversing lights.
Number plate lights: 1.8% here, against 4.6% of all 2014 cars.
Common 2014 MINI One diesel MOT failures and advisories
The share of 2014 MINI One diesel MOT tests where testers flagged each area, as a fail or an advisory. Rough prices are typical independent-garage costs.
- Tyres32% of testsRough price £70–£150
At the viewing: Check the tread on all four tyres, including the inside edges, and look for cracks or bulges.
- Brakes21% of testsRough price £150–£350
At the viewing: Look for a lip on the disc edges and feel for judder or pulling when braking firmly from about 40mph.
- Suspension13% of testsRough price £120–£400
At the viewing: Listen for knocks over speed bumps, and look behind each front wheel for a snapped coil spring.
- Lights and electrics11% of testsRough price £10–£80
At the viewing: Ask a friend to check every light, including brake lights and indicators, while you operate them.
- Wipers, windscreen and mirrors10% of testsRough price £15–£250
At the viewing: Check for chips in the driver's view, and test the wipers and washers.
- Oil and fluid leaks3% of testsRough price £80–£600
At the viewing: Look under the engine and on the ground where the car is usually parked for fresh oil or fluid.
Known faults on the 2014 MINI One diesel
Reported by owners, mechanics and buying guides for this model and age. Check which engine the car has, as some apply to one engine only.
Worn water pump
A whistle at idle that goes when you blip the throttle usually means the water pump is worn.
At the viewing: Listen at tickover once the engine is warm.
If it needs doing: Water pump, about £115–£375. ClickMechanic
Source: Parkers: MINI hatch buying guide
Questions to ask the seller before buying a 2014 MINI One diesel
Ask before you travel to see it. A seller who knows the car will have answers, and receipts.
- Any recent work on the engine warning light? (Flagged at MOT 2.4× as often on the 2014 MINI One diesel as on other cars the same age.)
- Can I see the service history and receipts for any big jobs?
Looking at a MINI One?
Check the actual car: its own MOT history, mileage and what to ask the seller. Free, no sign-up.
Other years
Every year of the MINI One compared
| Year | MOT tests | Most flagged |
|---|---|---|
| 2026 | – | Too new for MOT data |
| 2023 | – | Too new for MOT data |
| 2022 | 1,284 | Tyres 27% |
| 2021 | 2,698 | Tyres 27% |
| 2020 | 3,442 | Tyres 25% |
| 2019 | 4,588 | Tyres 28% |
| 2018 | 4,609 | Tyres 29% |
| 2017 | 15,961 | Tyres 33% |
| 2016 | 24,767 | Tyres 32% |
| 2015 | 31,025 | Tyres 30% |
| 2013 | 21,196 | Tyres 31% |
| 2012 | 12,997 | Tyres 30% |
| 2011 | 3,168 | Tyres 33% |
| 2010 | 1,781 | Lights and electrics 33% |
| 2009 | 1,035 | Exhaust and emissions 31% |
| 2008 | 933 | Brakes 35% |
| 2007 | 848 | Lights and electrics 36% |
| 2006 | 589 | Brakes 52% |
| 2005 | 590 | Brakes 54% |
| 2004 | 433 | Brakes 60% |
| 2003 | 270 | Brakes 61% |
| 2002 | 181 | Brakes 62% |
| 2001 | – | Too few tests |
Where this comes from: the DVSA's anonymised results for every MOT test done in Great Britain during 2023–2025, counting the MOTs of MINI One cars first registered in 2014. "Flagged" includes advisories, so it isn't the same as a fail rate. How we score