Best and worst used large cars for reliabilityWhich? reveals the most reliable used large car

09 January 2014


Large cars are big on space, but they can be big on repair bills too. Although some large cars cost barely more than a supermini in annual repair bills, others aren’t far behind the least reliable 4x4. In fact, the least reliable used car in the entire Which? Car Survey is a large car...

Large cars are not cheap purchases, so you hope that they’d fare well when it comes to reliability and not leave you stranded at the roadside in a cloud of smoke. However, while several Japanese models impress with reliability scores of more than 90%, one French car flounders with just 48%.

With such a range of costs and reliability, our survey results are particularly important, especially as used cars are unlikely to be covered by a warranty. Our car survey runs every year to discover which cars are models of reliability and which leave owners fuming - all from the people who own them. Tell us how reliable your car is by taking part in the 2014 Which? Car Survey.

Join Which? for £1 and gain instant access to all of our survey results.

Most reliable used large car

With a tiny annual repair bill of just £14, plus an impressive reliability score of 94%, the Toyota Prius (2009-) takes the crown as the most reliable used large car. Despite its complicated hybrid technology, which uses both a petrol engine and electric motor to power the car, the Prius has proved extremely reliable. Its breakdown rate is just 5%.

The Prius has been the pioneer for hybrid cars, so it’s reassuring to see that the addition of batteries isn't to the detriment of reliability. In fact, it secures a reliability score that's a hefty 46% above that of the worst performing used large car.  

Find out the five highest-rated used large cars for reliability

Peugeot 407 1

Least reliable used large car

The Peugeot 407 (2004-2011) doesn’t just earn the dubious title of the least reliable large car. It is also the least reliable used car in the entire Which? Car Survey, with an appalling reliability score of just 48% - 6% adrift of the second least reliable car.

Propping up the bottom of our league table, Peugeot 407 owners also face whopping average annual repair bills of £391 and a mediocre breakdown score of 9%. Showing how far off the pace the 407 is, the next worst performing large car has an 11% higher reliability score. Peugeot 407 owners are plagued with suspension faults, electronic braking problems and poorly air conditioning systems, to name but a few. We recommend you steer well clear.

Find out the five lowest-rated used large cars for reliability

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