2012 BMW 135: common problems and what to check
What gets flagged at MOT on 2012 BMW 135s, from 126 tests in 2025, plus known faults and what to look at before you buy one.
Small sample: only 126 of these were MOT tested in 2025, so treat the percentages as rough. The known faults below don't depend on it.
What gets flagged at MOT
The share of 2012 BMW 135 MOT tests where testers flagged each area, as a fail or an advisory. Rough prices are typical independent-garage costs.
- Tyres24% 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.
- Suspension15% 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.
- Oil and fluid leaks12% 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.
- Brakes12% 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.
- Lights and electrics12% of testsRough price £10–£80
At the viewing: Ask a friend to check every light, including brake lights and indicators, while you operate them.
- Steering4% of testsRough price £100–£450
At the viewing: On a straight road the steering wheel should sit straight. Feel for play or knocking when turning.
Known faults
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.
- EGR valve leak (diesel)Diesel
The EGR valve on diesels can leak and, in rare cases, has caused fires. BMW issued recalls.
At the viewing: Ask a BMW dealer whether the recall work was done. Watch for a strange smell or rough running.
- Engine and lights cutting out
An electrical fault could cut the engine and exterior lights. There have been three recalls.
At the viewing: Ask a BMW dealer to confirm the recall work. Flickering lights on the dash can be an early sign.
- Propshaft joint
The front propshaft joint can fail and leave the car stranded.
At the viewing: Listen for clunks or vibration from under the middle of the car.
- Water getting in
Blocked drains at the base of the windscreen can let water damage the electrics. Lights can mist up inside.
At the viewing: Look for condensation in the lights and damp carpets.
Looking at a BMW 135?
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Other years
| Year | MOT tests | Most flagged |
|---|---|---|
| 2013 | 103 | Tyres 19% |
| 2011 | 177 | Tyres 18% |
| 2010 | 142 | Tyres 20% |
| 2009 | 151 | Brakes 25% |
| 2008 | 321 | Suspension 25% |
Where this comes from: the DVSA's anonymised results for every MOT test in Great Britain in 2025, counting tests of 2012 BMW 135s registered in 2012. "Flagged" includes advisories, so it isn't the same as a fail rate. How we score