Brits who own a Porsche, Land Rover or Jaguar are likely to pay the most in repairs, as these vehicles have been named the ‘most unreliable’ according to Warrantywise.
Other luxury manufacturers, including Audi, BMW and Mercedes-Benz also appeared in the top ten list of most unreliable brands - proving that price doesn't always guarantee dependability.
Warrywise compared the number of faults, cost of repairs and how long they take to fix across manufacturers to create a Reliability Index.
The index, based on data for over 131,000 cars driven in Britain, gives every car a total score, with data representing cars outside their manufacturer warranties.
This means the minimum age for the sample is three years, while the maximum age for cars included in the analysis is 10 years.
The worst scoring car brand was Porsche, which scored just 35.1 out of 100 in Warrantywise’s Reliability Index.
According to the warranty provider, a one-off Porsche repair could cost as much as £10,784.60.
But this wasn't the priciest repair bill on record. Warrantywise said the £10k paled in comparison to a Land Rover that incurred a huge garage receipt of £23,889.53 - almost the price of a brand new Volkswagen Golf.
Land Rover came in second in the list of most unreliable brands, followed by Jaguar.
The Range Rover was named the least reliable car in the summer by Warrantywise, which contributed towards Land Rover as a whole scoring just 40.2/100 in the Reliability Index.
Warrantywise said: “Joining Porsche is a range of premium luxury passenger car makers; proving that despite a high price tag, even for a used car, luxury cars could also cost owners more in the long run.”
Sister brand, Jaguar, placed third from the bottom spot with a reliability score of 48.2.
One Jaguar, which had a dodgy turbocharger on one of the British cars, costed £16,990.02 to resolve.
According to their findings, the most expensive one-off repairs for each of the worst performing brands are:
- Porsche: £10,784.60
- Land Rover: £23,889.53
- Jaguar: £16,990.02
- Alfa Romeo: £6,760.32
- Audi: £17,212.42
- BMW: £19,678.80
- Mercedes-Benz: £23,302.20
- Vauxhall: £8,368.80
- Volvo: £9,633.60
- Mitsubishi: £9,003.91
These figures are based on a single repair bill for models from each brand in the years 2021-22.
Lawrence Whittaker, CEO of Warrantywise said that that the suites of high-end technology offered by luxury brands mean they can be more difficult and expensive to fix.
He said: "Premium prices really do make for premium costs, as is evident from the data in the Reliability Index.
"And, with more technology in high-end cars than ever before, we suppose it’s only natural that they require a bit more TLC than normal."
