25 most unreliable cars

While some cars never go wrong, others are afflicted by numerous faults. Here's our round-up of the most problematic models aged up to five years old...

Land Rover Discovery front three quarters

5. Land Rover Discovery (2015-present)

Reliability rating: 77.9%

Although 34% of Discoverys had a problem, the most frequently cited areas were less crucial ones such as the bodywork and interior trim. There were a smaller number of issues with the air-con, gearbox/clutch and non-engine electrics. Two-thirds of the faulty cars were in the repair shop for more than a week, and although 96% of work was done under warranty, some owners paid out between £300 and £500.

Read our full Land Rover Discovery review >>

4. Range Rover Sport (2013-present)

Range Rover Sport front three quarters

Reliability rating: 74.2%

The Range Rover Sport is the least dependable luxury SUV. Owners told us that 40% of their cars had gone wrong, a worryingly high proportion of them with engine problems. There were also problems with the bodywork, engine and non-engine electrics, brakes and suspension. A third of cars couldn’t be driven and nearly half took more than a week to repair. The good news is that 98% of them were fixed for free.

Read our full Range Rover Sport review >>

3. Land Rover Discovery Sport (2014-2019)

Land Rover Discovery Sport

Reliability rating: 73.1%

The Discovery Sport is the most unreliable large SUV. A whopping 49% of cars went wrong, with the model chalking up problems in every one of our fault categories. Half of cars could still be driven, but a third took more than a week to put right. While 88% were fixed for free, non-warranty repair bills ranged from less than £50 to £1000.

Read our full Land Rover Discovery Sport review >>

2. Seat Alhambra (2011-2020)

Seat Alhambra

Reliability rating: 70.8%

The Alhmabra may be big and practical, but it's the least robust MPV, according to owners. They told us a third of their vehicles had a problem, with issues covering a wide range of components including the air-con, battery, bodywork, brakes and engine. A quarter of them couldn't be driven, and more than half took longer than a week to put right. Although 82% of repairs were done under warranty, the remaining owners paid between £300 and more then £1500 to get their cars fixed.

Read our full used Seat Alhambra review >>

See how much you could save on a new Seat Alhambra >>

1. Audi A6 (2011-2018)

Audi A6 Avant

Reliability rating: 70.6%

What went wrong? Battery 14%, bodywork 9%, engine 6%, engine electrics 6%, fuel system 6%, non-engine electrics 6%, brakes 3%, exhaust 3%, gearbox/clutch 3%, infotainment/sat-nav 3%

A wide range of problems afflicted the previous-generation Audi A6, including issues with the battery, bodywork, engine, electrics, exhaust, gearbox/clutch and infotainment/sat-nav. Overall, owners told us that nearly a quarter (23%) of their cars had gone wrong. More than half of those cars couldn’t be driven and took more than a week to fix, and although 40% of them were fixed for free, some owners faced bills of more than £1500. That's why the used A6 is the least dependable luxury car, and the most unreliable car in our survey. 

For all the latest reviews, advice and new car deals, sign up to the What Car? newsletter here

<< PreviousTell us how reliable your own car is >>

Page 3 of 3