What faults does your engine have?
Choose your car and we will tell you what faults its engine has, from how many kilometres they appear, how much they cost to fix and how to avoid them. Everything with sources.
Find your car
Make, model, year and engine: we take you to its known faults.
Or go straight to the engine: 1.2 PureTech, BMW M57, 1.0 EcoBoost, 1.0 TSI / 1.5 TSI, 1.2 and 1.4 TSI, 1.5 BlueHDi · See the 203
- documented cars
- 788 documented cars
- engines and gearboxes
- 203 engines and gearboxes
- sourced faults
- 4474 sourced faults
- cited sources
- 2527 cited sources
Reliability score from 0 to 10 for the 522 cars analysed in depth. Reviewed on 30 October 2026.
Has a warning light come on?
All warning lightsA noise, a warning light, smoke? Tell us
Describe it in your own words or by voice and we will tell you which known faults fit and how urgent it is.
The most searched-for engines
Problems, faults and reliability of the most searched-for engines in Spain, and which cars use them.
- 1.2 PureTech engineEB2Peugeot, Citroën, DS and Opel7 faultsRisk index96
- BMW M57 engineBMW, Land Rover and Opel5 faultsRisk index63
- 1.0 EcoBoost engineFord4 faultsRisk index71
- 1.0 TSI / 1.5 TSI engineEA211Volkswagen, Seat, Cupra and Škoda5 faultsRisk index23
- 1.2 and 1.4 TSI engineVolkswagen, Seat, Škoda and Audi5 faultsRisk index84
- 1.5 BlueHDi engineDV5Peugeot, Citroën, DS and Opel5 faultsRisk index77
- 1.9 TDI engineVolkswagen, Seat, Škoda and Audi6 faultsRisk index66
- 1.6 HDi engineDV6Peugeot, Citroën, DS and Ford7 faultsRisk index71
- 1.6 TDI engineVolkswagen, Seat, Škoda and Audi5 faultsRisk index45
- 1.3 Multijet engineFiat, Lancia, Alfa Romeo and Opel5 faultsRisk index64
- 1.4 TDI engineVolkswagen, Seat, Škoda and Audi4 faultsRisk index38
- BMW N47 engineBMW and MINI5 faultsRisk index87
The most searched-for faults
- Critical severityFrequency: Very frequent1.2 PureTechOil-bath timing belt degradationThe oil-bath belt on the 1.2 PureTech (2012-2025) can swell and shed debris that blocks the oil pump pick-up; without lubrication, the engine can be destroyed. Stellantis covers it up to 10 years or 180,000 km and asks for it to be changed every 100,000 km or 6 years.Repair (garage): €400–€800
- Critical severityFrequency: Very frequent1.5 BlueHDiWear and breakage of the 7 mm chain between the camshaftsIn 1.5 BlueHDi engines built between October 2017 and January 2023, the 7 mm chain linking the camshafts can stretch and break, causing serious engine damage. Stellantis has recalled them and covers the fault for 10 years or 240,000 km.Repair (garage): €730–€820
- Critical severityFrequency: Very frequent1.2 and 1.4 TSITiming chain stretch and tensioner failure (EA111)On the 1.2 and 1.4 TSI EA111 (2006-2015) the chain can stretch and the tensioner fall short; if the chain jumps a tooth, the valves hit the pistons. Volkswagen admitted the defect in 2012 and revised the chain and tensioner between 2010 and 2011.Repair (garage): €700–€1,400Appears at around 30,000 km
- Critical severityFrequency: Very frequentBMW N47Rear timing chain stretch and breakageYes: the N47 has its timing chain at the rear of the engine, next to the gearbox, and on a very high proportion of units, especially those built between 2007 and 2009, it stretches or breaks prematurely because of an inadequate tensioner, with a risk of destroying the engine.Repair (garage): €1,590–€3,000Appears at around 50,000 km
- Critical severityFrequency: Very frequentOM651Timing chain stretch and tensioner failureYes: the OM651 timing chain can stretch prematurely, above all on units built up to 2013, and in 2014-2015 Mercedes-Benz recalled around 114,000 vehicles in Germany over a defective sealing ring in the tensioner. A metallic rattle on a cold start is the first sign.Repair (garage): €2,000–€3,500Appears at around 120,000 km
- Critical severityFrequency: Very frequentBMW B47EGR cooler leaks with risk of engine fireYes: the EGR valve cooler can suffer internal coolant leaks which, mixed with soot and oil, can reach combustion temperatures; BMW has launched several technical campaigns since 2018 to inspect and replace it because of the risk of engine fire.Repair (garage): €500–€1,500
Least reliable engines
According to our risk index, which weights the severity and frequency of their documented faults.
- 11.2 PureTechPeugeot, Citroën, DS, Opel, Fiat, Jeep, Alfa Romeo, Lancia and ToyotaCritical severity96
- 2OM651Mercedes-Benz and InfinitiCritical severity89
- 3BMW N47BMW and MINICritical severity87
- 4BMW N57BMWCritical severity87
- 52.0 Ingenium diéselLand Rover and JaguarCritical severity87
- 61.2 and 1.4 TSIVolkswagen, Seat, Škoda and AudiCritical severity84
More rankings
- Most reliable enginesThose that give the fewest serious problems among those analysed.
- Most reliable diesel enginesThe diesels analysed, from lowest to highest risk.
- Most reliable brandsAverage score of each brand’s analysed models.
- Wet timing belt enginesWhich engines use it and what risks it carries.
- Most expensive repairsThe faults that cost the most to fix.
- Compare two enginesFaults, versions and verdict, side by side.
Cars: the least and most reliable
Adding up their engines and their suspension, brake, electronics and rest-of-car faults.
Faults by part
Turbo, EGR valve, clutch, brakes, electronics… Which engines and cars fail on each part and how much it costs to repair.
- Airbags319
- Control arms, ball joints, bushes and drop links244
- Clutch209
- Screen and infotainment system197
- Wiring, connectors and short circuits160
- Steering rack and steering column147
- Window regulators and central locking138
- Fire risk131
- Shock absorbers and top mounts130
- ABS and stability control (ESP)115
- Power steering114
- Paintwork, rust and corrosion114
- Seat belts109
- Manual gearbox106
- Handbrake and parking brake105
- Brake calipers, discs and pads105
- Brake servo and vacuum pump99
- Driver assistance and automatic emergency braking99
- All parts
Latest recalls
- Renault SymbiozTraction battery assembly error (0FDZ)
- Mercedes-Benz Clase S W223Front brake hoses leaking
- Volvo EX30Volvo R10396: front head restraint cushions
- Fiat Grande PandaKBA 16906R: warning lights that may not illuminate (500e and Panda)
- Audi Q3 IWorldwide recall for steering bolt corrosion
Most searched-for fault codes
Got a code from the reader or the garage? What it means, causes and whether you can keep driving.
- P0299Turbo underboost (insufficient pressure)
- P0420Catalytic converter efficiency below threshold (bank 1)
- P0401Insufficient EGR flow
- P0087Fuel rail or fuel pressure too low
- P0380Glow plug circuit fault
- P0234Excessive turbo pressure (overboost)
- P0101Air flow meter (MAF): signal outside expected range
- P0171Mixture too lean (bank 1)
- P2002Low particulate filter (DPF) efficiency
- P0113Intake air temperature sensor: high signal
- P0300Misfires on multiple cylinders
- P2263Boost system performance
What’s wrong with your car?
Start with what you notice and we will tell you which faults cause it.
- Suspension knocks
- Electronic warnings
- Less power
- Engine warning light
- Screen failure
- Window/lock failure
- Airbag light
- Slipping clutch
- Heavy steering
- Jerking
- Gears will not engage
- Battery goes flat
- Vibrations
- Hard brake pedal
- Engine stalls
- Hard to start
- ABS/ESP light
- Rust
- Steering play
- Limp mode
- Gearbox noise
- Water leak
- Uneven wear
- Uses oil
- All symptoms
Faults by brand
- Abarth2
- Alfa Romeo13
- Audi36
- BMW48
- BYD1
- Chrysler4
- Citroën32
- Cupra4
- Dacia14
- Dodge1
- DS6
- Fiat23
- Ford36
- Honda19
- Hyundai28
- Infiniti2
- Iveco3
- Jaecoo1
- Jaguar6
- Jeep10
- Kia30
- Lancia8
- Land Rover14
- Lexus4
- Lotus2
- Lynk & Co1
- Mazda22
- Mercedes-Benz58
- MG9
- MINI7
- Mitsubishi6
- Nissan26
- Omoda1
- Opel35
- Peugeot35
- Polestar1
- Porsche7
- Renault45
- Rover4
- Saab1
- Seat17
- Škoda23
- Smart3
- Subaru9
- Suzuki15
- Tesla4
- Toyota41
- Volkswagen45
- Volvo26
Frequently asked questions about engines
Which engines give the most trouble?
According to our risk index (0 to 100), which weighs the severity and frequency of documented faults, the engines with the most problems are the 1.2 PureTech (96), the OM651 (89), the 2.0 Ingenium diésel (87), the BMW N47 (87) and the BMW N57 (87).
Which is more reliable, a diesel or a petrol engine?
Both fuels have reliable engines and problematic ones. On our risk index (0 to 100), of the 67 diesel engines analysed the lowest is the 2.2 MultiJet / BlueHDi (Stellantis) (14) and the highest the OM651 (89); of the 91 petrol engines, the 1.0 and 1.4 Boosterjet (6) and the 1.2 PureTech (96).
What does the engine warning light mean?
The engine warning light, the yellow or orange outline of an engine, comes on when the control unit detects a mechanical or electronic fault in the engine or the emissions system, but it does not say which one by itself. If it stays steady and the car drives normally, you can carry on with caution to a garage to have the codes read; if it flashes, turns red or the car loses power, the sensible thing is to stop. With it on, the car will also fail the ITV (the Spanish roadworthiness inspection, equivalent to the MOT).
Which cars share the same engine?
Many engines are fitted to cars from several brands, and their faults repeat across all of them: the 1.2 PureTech is fitted to Peugeot, Citroën, DS, Opel, Fiat, Jeep, Alfa Romeo, Lancia and Toyota cars; the 1.5 dCi is fitted to Renault, Dacia, Nissan, Mercedes-Benz, Infiniti and Suzuki cars; the 1.3 Multijet is fitted to Fiat, Lancia, Alfa Romeo, Opel, Suzuki and Ford cars. Each engine's page lists the models that use it.
How do I know which engine my car has?
Search for your car by make, model and year: we show you the engines fitted to each version and the faults of each one. If you already know the engine code (for example BKD, K9K or EB2), you can search for it directly.
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