What Car? have issued the results of their 2015 UK warranty survey on the reliability of cars of between 3 to 8 years old. It showed that autos made by Japanese manufacturers were the most reliable, and (surprisingly) those made by the Germans amongst the worst.
The top three were Top of the poll was Honda, Suzuki and Toyota. Whilst the worst was the (German owned) Bentley, with Porsche, Mercedes Benz and Audi just above.
It should be noted that repair costs were a factor in the scoring mechanism, and spare parts for a Bentley or a Porsche are going to be a lot more than for a Honda or a Suzuki.
4 Chevrolet / Mazda
9 Hyundai / Nissan / Subaru
12 Daewoo / Peugeot
27 Land Rover
28 BMW / MG