BMW 1 Series common problems and MOT failures

What usually goes wrong with a BMW 1 Series?

Known faults reported by owners, mechanics and UK buying guides, in our own words. Most apply to certain years or engines only, so check which the car has.

• EGR valve leak (diesel)

  Cars registered 2011–2019 · 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.

  Source: Parkers: BMW 1 Series (2011-2019) used review

• Fuel filter heater: flat battery and fire risk (diesel, built Aug 2008 to June 2009)

  Cars registered 2008–2009 · 2.0 diesel, built 2008 to 2009

  Moisture can get into an electrical connection at the fuel filter, draining the battery so it won't start, with a fire risk if it happens while parked after driving.

  At the viewing: Ask a BMW dealer to confirm the fix was done.

  Source: What Car?: common BMW 1 Series (2004 on) problems

• Engine and lights cutting out

  Cars registered 2011–2019

  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.

  Source: Parkers: BMW 1 Series (2011-2019) used review

• Propshaft joint

  Cars registered 2011–2019

  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.

  Source: Parkers: BMW 1 Series (2011-2019) used review

• Rear axle, brake servo and airbag faults

  Cars registered 2004–2010 · Some cars

  Faults to have been fixed: loose rear control arm joints (built May to Sept 2004), a leaking brake servo seal (built March 2006) and airbag and seatbelt wiring (built May to July 2008).

  At the viewing: Ask a BMW dealer to check the VIN for outstanding work.

  Source: What Car?: common BMW 1 Series (2004 on) problems

• Electrical and warning light faults

  Cars registered 2020–2025 · All engines

  The main faults reported are electrical: warning lights with no clear cause and infotainment faults.

  At the viewing: Test the screen and check no warning lights stay on.

  Source: What Car?: used BMW 1 Series (2019 on) reliability

• Particulate filter warnings (diesel)

  Cars registered 2020–2025 · Diesel

  Diesels have more problems, including DPF warnings and engine management faults.

  At the viewing: Ask what journeys it does, and watch for warning lights.

  Source: What Car?: used BMW 1 Series (2019 on) reliability

• Power steering warning (built June 2007 to Dec 2011)

  Cars registered 2007–2010 · Built from June 2007

  A part in the steering control module can fail, lighting the EPS warning and making the steering heavier.

  At the viewing: Make sure the steering light goes out and the steering feels light.

  Source: What Car?: common BMW 1 Series (2004 on) problems

• Water getting in

  Cars registered 2011–2019

  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.

  Source: Parkers: BMW 1 Series (2011-2019) used review

• Airbag and camshaft recalls (2020)

  Cars registered 2020–2025 · Some cars

  Recalls covered the driver's airbag fabric (about 1,100 cars) and camshaft bearing cap screws that could come loose (39 cars).

  At the viewing: Ask a BMW dealer to confirm the recalls were done.

  Source: What Car?: used BMW 1 Series (2019 on) reliability

Common BMW 1 Series MOT failures to check

Parts flagged at MOT well above the usual rate for cars the same age, for each fuel on its own. From the DVSA’s results for every MOT done in Great Britain during 2023–2025.

Petrol

• Flexible brake hoses

  up to 5.6× usual

  Stands out on cars registered in 2005, 2006, 2007, 2008 and 2009.

  Rough price £50–£200 our estimate

  At the viewing: Look for cracked or bulging rubber hoses behind the wheels and in the engine bay.

• Steering rack inner joints

  up to 5.1× usual

  Stands out on cars registered in 2012, 2013 and 2014.

  Rough price £100–£450 our estimate

  At the viewing: On a straight road the steering wheel should sit straight. Listen for knocks when turning, and check the steering feels even.

• Exhaust emissions (catalyst)

  up to 2.6× usual

  Stands out on cars registered in 2005, 2007 and 2011.

  Rough price £175–£900 (catalytic converter) ClickMechanic

  At the viewing: Look for smoke when revving the warm engine and for an engine warning light.

• Engine oil leaks

  up to 2.5× usual

  Stands out on cars registered in 2005, 2006 and 2014.

  Rough price £80–£600 our estimate

  At the viewing: Look under the engine and where the car is usually parked for fresh oil. Ask whether the leak has been looked at.

• Link ball joint covers

  up to 1.9× usual

  Stands out on cars registered in 2012 and 2013.

  Rough price £60–£150 (one joint) ClickMechanic

  At the viewing: Listen for knocking over bumps and check the rubber boots behind the wheels aren't split.

Diesel

• Shock absorbers

  up to 3.1× usual

  Stands out on cars registered in 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012 and 2013.

  Rough price £200–£300 (pair, average rear to front) ClickMechanic

  At the viewing: Push down hard on each corner. It should bounce once and settle. Look for oil on the shock absorber body.

• Flexible couplings

  up to 27× usual

  Stands out on cars registered in 2007, 2008, 2009, 2010 and 2011.

  Rough price £150–£1,000 our estimate

  At the viewing: Check the sills, wheel arches and underneath for rust, and look along the panels for uneven gaps or paint.

• Flexible brake hoses

  up to 7.7× usual

  Stands out on cars registered in 2005, 2006, 2007, 2008 and 2009.

  Rough price £50–£200 our estimate

  At the viewing: Look for cracked or bulging rubber hoses behind the wheels and in the engine bay.

• Wheels

  up to 3.6× usual

  Stands out on cars registered in 2012, 2013, 2017 and 2019.

  Rough price £70–£150 our estimate

  At the viewing: Check the tread on all four tyres, including the inside edges, and look for cracks or bulges.

• Sub-frame

  up to 2.6× usual

  Stands out on cars registered in 2005, 2006 and 2008.

  Rough price £300–£1,000 our estimate

  At the viewing: Look underneath at the frame the suspension bolts to. Flaky rust or holes are expensive to fix.

• Transmission oil leaks

  up to 15× usual

  Stands out on cars registered in 2018 and 2019.

  Rough price £80–£600 our estimate

  At the viewing: Look under the engine and where the car is usually parked for fresh oil. Ask whether the leak has been looked at.

BMW 1 Series MOT pass rate by year

Of the years since 2005 with plenty of MOT tests, the 2014 BMW 1 Series did best (83% passed first time, 13 points above all 2014 cars) and the 2019 did worst (87%, 2 points above all 2019 cars). Older cars fail more, so compare each year with all cars registered the same year.

Questions to ask the seller before buying a BMW 1 Series

Ask before you travel to see it. A seller who knows the car will have answers, and receipts.

1. Has the BMW recall work, including the EGR valve, been done?
2. Has the fuel filter heater fix been done?
3. Any recent work on the shock absorbers? (Flagged at MOT 2.5× as often on the BMW 1 Series as on other cars the same age.)
4. Any recent work on the flexible brake hoses? (Flagged at MOT 6.7× as often on the BMW 1 Series as on other cars the same age.)
5. Any recent work on the steering rack inner joints? (Flagged at MOT 6.5× as often on the BMW 1 Series as on other cars the same age.)
6. Can I see the service history and receipts for any big jobs?