Most unreliable executive cars

While the best executive cars are refined, efficient and packed with the latest tech, reliability is also important. So, which are the most and least dependable?...

Mercedes C-Class front three quarters
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Claire Evans
16 Jan 2020 07:40

The three most unreliable executive cars:

Mercedes C-Class (2014-present)

Score 87.6%

Just under a third of Mercedes C-Class models had faults, mostly with the exhaust, then the engine electrics and suspension. Around half were laid up for more than a week and a quarter were rendered undrivable. Most fixes were free, but a few owners paid up to £1000.


Vauxhall Insignia (2008-17)

2013 Vauxhall Insignia review

Score 85.4%

Even more (39%) Vauxhall Insignias had a problem, with two important areas, the braking system and engine, the most frequently concerned. More than half could still be driven and were fixed the same day, but a third cost owners from £51 to more than £1500.


Jaguar XE diesel (2015-present)

2016 Jaguar XE 2.0d 180 AWD R Sport review

Score 82.6%

The most unreliable executive car, though, according to respondents of our survey, was the diesel Jaguar XE. Issues were reported in every one of our 14 fault categories. And while some 75% of cars could still be driven and most were fixed for free, some brought bills ranging from £500 to more than £1500.