Least reliable luxury cars
The least reliable luxury cars
3. BMW 5 Series diesel (2017-present)
Reliability rating 89.1%
With a fault rate of 31%, almost twice as many diesel 5 Series’ went wrong as petrol versions. This was due to a higher number of engine electrical faults adding to the bodywork issues and non-engine electrical issues that are prevalent in the petrol cars.
Whereas the cost of repairing all petrol cars was covered under warranty, for 27% of diesel cars, it was not, leaving owners with bills of more than £1500 in 3% of cases. However, things weren't all bad; just 3% of diesels broke down, compared with 25% of petrol 5 Series models.
Read our full BMW 5 Series review >>
2. Audi A6 (2018-present)
Reliability rating 85.3%
Problems with the electrical systems, bodywork, engine, or the infotainment system cropped up across 47% of A6s over the past year, and 37% of these faults were so severe that they took more than a week to rectify, with 7% of owners being charged between £201 and £300 for remedial work. However, the remaining 93% of repairs were covered by Audi.
Fortunately, just 4% of cars broke down completely, and that somewhat mitigates what could have been a shockingly low rating for the current A6.
Read our full Audi A6 review >>
1. Audi A6 (2011-2018)
Reliability rating 82.1%
You might be tempted by the previous-generation A6’s stylish looks and relatively low secondhand prices, but we’d advise caution when buying one. That’s because 40% went wrong over the past year, with 10% of those taking more than a week to put right.
Furthermore, 40% of owners had to pay for remedial work, with half of bills costing between £501 and £750. If you’ve got your heart set on a previous-generation A6, exercise due diligence first – our used review is a great starting point, detailing all the recall actions and areas of concern, as well as how you can get the most for your money.
Read our used Audi A6 (2011-2018) review >>
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