The UK's least reliable cars are all highly prestigious lifestyle statements, according to
Warranty Direct's reliability index. This is based on how frequently each model fails, the
average cost of repair, the average time off-road, and the average vehicle's age and
mileage at the point of breakdown. Each model is awarded a numerical rating, with the
least reliable cars scoring the highest and the best performers scoring lowly.
For example, according to Warranty Direct, the least reliable model available is the Audi
RS6. This high-performance beast has a reliability index score of 686.98, compared to
an average rating of 100. The typical age of RS6s under repair is 4.88 years, and these
road legal racers have averaged 51,960 miles during this time. When these costly fashion
statements fail, the average repair costs £995.63 and takes a lengthy 6.56 hours.
The second least reliable car in Warranty Direct's database is the Jaguar XK8, which
scores an eyebrow raising 370.63. This is followed in third by the fashionable Mercedes-
Benz SL, the striking BMW Z3 finishes forth, and the powerful Jaguar XKR is fifth. In
fact, the ten least reliable vehicles in the index are all produced by highly prestigious
manufacturers. That is rather concerning considering the hype.
Reliability indexes are worthwhile indicators of possible - perhaps even probably - short
and long term performance, However, they are only guides and competing indexes
may draw different conclusions. It is also worth considering that how a vehicle is treated
influences its reliability, so regular maintenance and proper care are both very important.