Best and worst used medium cars for reliabilityRevealed: the most reliable medium-sized used car

24 December 2012

Kia Cee'd

There are some great offers on second-hand medium cars, but pick one with poor reliability and you could be left seriously out of pocket. 

The latest Which? Car Survey reveals that while some medium-sized cars cost less than £10 a year to repair, nearly half of those reported on cost more than £100 each year.

We feed the reliability data gained from our survey into every car review, so you know how reliable a car will be before you buy it.

You can read the full results from our survey by taking out a trial subscription to Which?

Most reliable used medium car: Kia Cee'd (07-12)

The Kia Cee'd has an impressive reliability record in both petrol and diesel forms, but it's the petrol model that tops our table.

Owners of this car who completed the 2012 Which? Car Survey told us that the petrol-powered Cee'd cost an average of just £9 a year to repair. The diesel variant wasn't too far behind, in the 10th spot.

These high scores, combined with impressive test lab results and good customer satisfaction scores, contributed to Kia being named as car manufacturer of the year in the Which? Awards 2012.

Our survey elicited responses from around 40,000 car owners and provided information on around 300 different models. Read our report to find out which were the five highest-rated used medium cars for reliability.

Least reliable used medium car: Ford Focus (98-04)

Ford Focus

The Focus set the standard in this sector for many years, and this 1998-2004 model remains a popular secondhand choice.

Few rivals can begin to match its blend of good handling, general refinement and overall practicality, least of all at such an accessible price.

However, the reliability of diesel models is dismal. It's one of the worst used cars recorded in our survey and the worst medium car by some 7.7%.

The average annual repair cost is also the highest in this category at a staggering £305.

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