2018 What Car Reliability Survey

We asked more than 18,000 people to to tell us about the reliability of their cars. From that data, we've compiled ratings for 159 models from 31 different car brands. Here we reveal the most - a...

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Claire Evans
5 Sep 2017 16:0 | Last updated: 17 Sep 2018 15:53


Most reliable: Mercedes-Benz B-Class - 95.9%

What went wrong? Battery 7%; Fuel system 7%; Gearbox/clutch 7%

Although 20% of Mercedes B-Classes developed a fault, two-thirds of cars were still driveable and all were repaired in less than a week; a third were fixed in less than day. Even better, all work was completed under warranty, meaning not one owner received a repair invoice.

While 18% of Volkswagen Golf SVs had a fault, none was major; 12% were for non-engine electrics, followed by air-con, bodywork and engine electrics (all 6%). All cars remained driveable and were fixed in a day. All work was covered by the warranty.

Just 21% of owners reported a problem with their Ford C-Max or Grand C-Max. Faults with the non-engine electrics and sat-nav were the most common (both 11%). There were also a few reports of bodywork issues. Most cars could still be driven and were back on the road in less than a day. Every one was fixed for free.

2018 What Car Reliability Survey

Least reliable: Citroen C4 Picasso - 86.2%

What went wrong? Non-engine electrics 13%; Engine electrics 10%; Air-con 6%; Engine 4%; Gearbox/clutch 6%; Battery 2%; Bodywork 2%; Brakes 2%; Exterior lights 2%; Interior trim 2%; Sat-nav 2%; Suspension 2%; Wheels/tyres 2%

Nearly a third of Citroën C4 Picassos had a fault, with non-engine electrics by far the most frequently reported problem area, followed by engine electrics. Most spent less than a week in the garage. A few owners were presented with repair bills of up to £300.

Citroën’s smaller C3 Picasso also fared badly, with 38% going wrong. At least most were repaired the same day. Problem areas included non-engine electrics (13%), bodywork, engine, engine electrics, exterior lights, the fuel system and interior trim (all 6%).

The old Peugeot 3008 isn’t as durable as its SUV successor, with faults reported on 30% of cars. The most common problem areas were non-engine electrics, sat-nav and suspension (all 10%). All repairs were free and most cars were back on the road that day.

Reliability for MPVs aged one to four years old

| Rank | Make and model | Score |
|---------------|--------------------|---------------------------|| 1 | Mercedes-Benz B-Class (2012-present) | 95.9% || 2 | Volkswagen Golf SV (2014-present) | 95.8% || 3 | Ford C-Max / Grand C-Max (2010-present) | 94.9% || 4 | BMW 2 Series Active Tourer (2014-present) | 94.5% || 5 | Peugeot 3008 (2009-2016) | 91.9% || 6 | Citroen C3 Picasso (2009-2017) | 87.8% || 7 | Citroen C4 / Grand C4 Picasso (2013-2018) | 86.9% |

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