Unreliable car brands list sees Porsche come top

Porsche has topped the list of the most unreliable car brands, through analysis of warranty plans offered by Warrantywise.

The carmaker is one of a number of premium carmakers in the top ten, proving that vehicles with high price tags are not necessarily going to offer peace of mind and lower running costs once they leave the showroom. 

Porsche came top with a score of 35.1 out of 100, and a highest repair bill totalling £10,784.60. However, carmaker Jaguar Land Rover had two entries in the top ten unreliable car brands, with the Land Rover brand following Porsche, although the highest overall repair bill totalled £23,889.53. Warrantywise named the Range Rover model the least reliable earlier this year.

Jaguar placed as the third most unreliable car brand, with the engine’s turbocharger proving the costliest single repair at £16,990.02.

Premium rules in unreliable car brands list

Alfa Romeo, Audi, BMW, Mercedes-Benz, Vauxhall, Volvo and Mitsubishi were also included in the top ten. That means that eight of the top ten unreliable car brands in the UK are premium manufacturers, while repair bills are extremely high. The increasing complexities of vehicles are not helping matters, with repair work becoming more and more difficult to undertake.

The repair costs were collated between 2021 and 2022. Since then, Warrantywise has seen an increase in labour costs and parts prices, that are not reflected in its current list. 

Top Ten Least Reliable Marques

Lawrence Whittaker, CEO of Warrantywise, commented: “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. 

“As the concept of luxury has expanded and become more available to a wider audience, high-end supercars are clearly still in high demand.”