2019 What Car? Reliability Survey: luxury cars
To help you choose the most dependable car, we've crunched the data on more than 18,000 vehicles, spanning 31 brands and 218 models to give each a unique reliability rating...
Average reliability score for class 90.4%
Most reliable Jaguar XJ (2010-2019) 94.3%
What went wrong? Non-engine electrics 25% Air-con 6% Bodywork 6%
The Jaguar XJ had a fairly high proportion of electrical issues, but all faulty examples could still be driven and two-thirds were sorted out the same day. The remaining third needed more than a week to be put right, but all work was done under warranty.
Just under a third (31%) of previous-generation Mercedes E-Class models had a fault, with non-engine and engine electrics the main culprits, accounting for 10% and 7% of problems respectively. Some cars also had issues with the air-con, exhaust, interior trim and suspension. However, all cars could still be driven, two-thirds were repaired the same day and all work was done for free.
Fewer BMW 5 Series (22%) had a problem, with non-engine electrics the most common complaints, followed by engine electrics. But some cars were undrivable and most took up to a week to be fixed.
Least reliable Jaguar XF (2007-2015) 86.8%
What went wrong? Air-con 5% Bodywork 5% Brake system 5% Engine electrics 5% Fuel system 5% Non-engine electrics 5%
Although a fairly high percentage of Jaguar XFs suffered a fault, all could still be driven and were fixed within a day. However, most weren’t fixed under warranty, costing owners up to £200 each time.
In contrast, most Mercedes-Benz S-Class models were fixed for free, with only a few owners having to pay up to £300. However, owners are likely to have spent more time at garages; half had gripes, most commonly with non-engine electrics. All cars could still be driven, and the majority were back on the road in less than a week.
The previous-generation BMW 5 Series suffered fewer faults (39%) but in more serious areas: 10% had exhaust issues and 8% had engine issues. A quarter of cars couldn’t be driven, and although most were fixed for free, a few owners had to shell out up to £1500.
Results for luxury cars aged up to five years old
|Rank||Make and model||Score|
|1.||Jaguar XJ 2010-on||94.3%|
|2.||Mercedes E-Class 2009-2016||92.8%|
|3.||BMW 5 Series 2017-on||92.6%|
|4.||Audi A6 2011-2018||91.6%|
|5.||Jaguar XF 2015-on||89.7%|
|6.||Mercedes E-Class 2016-on||89.2%|
|7.||BMW 5 Series 2010-2017||88.4%|
|8.||Mercedes S-Class 2014-on||88.1%|
|9.||Jaguar XF 2007-2015||86.8%|