25 most unreliable new cars

Some cars motor along for years without missing a beat, but others are afflicted by fault after fault. Here's our round-up of the most problematic 25 cars aged up to three years old...

1. 25 most unreliable new cars
Most unreliable new cars
Volkswagen Polo
Mercedes-Benz GLA
Mazda 3 diesel (2009-2013)
Volkswagen CC
Citroën C4 Picasso
Seat Ateca
Range Rover
Volvo V40
Nissan Juke
Land Rover Discovery
Mazda 2
Tesla Model S
Range Rover Evoque
Nissan Note
Nissan Pulsar
Mercedes-Benz B-Class
Mercedes-Benz E-Class saloon
Nissan Qashqai diesel
Land Rover Discovery Sport
Jeep Renegade
Jaguar XE
Fiat 500X
Nissan Qashqai petrol
Volvo XC90
Range Rover Sport
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We asked more than 14,000 car owners to tell us how dependable their cars had been over the previous 12 months. A third of respondents told us their car had suffered at least one fault.

To categorise the faults and rate them for seriousness, we asked car owners to pick the area where the fault occurred from one of 14 groups: battery, bodywork, brakes, engine, engine electrics, exhaust, exterior lights, fuel system, gearbox/clutch, interior trim, non-engine electrics, steering, suspension and other.

We also asked owners to tell us how long their car was off the road while it was getting fixed and how much the repairs cost. We used this information to create the unique What Car? reliability rating, which penalises models that have lots of expensive faults and rewards dependable ones with a higher score.

Our full survey results reveal the dependability of 169 models from 33 car brands.

Read the full What Car? reliability survey

Tell us how reliable your car is in the 2018 What Car? reliability survey and you could win £250

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