Most reliable new medium car revealedBest and worst medium cars for reliability in 2012

30 January 2013

Toyota Auris Hybrid

Which? has revealed the UK's most reliable new medium car - and it's made in Britain. The Derbyshire-built Toyota Auris suffered the fewest faults of any new car in the UK, according to owners who took part in the latest Which? Car Survey.

The Toyota Auris replaced the hugely successful Corolla in 2007. While all Auris models perform well for reliability, it's the Auris Hybrid version that trumps all others.

We collected information on over 47,000 cars in our survey, making it the largest such survey in the UK. The results show a stark contrast between the best and worst medium cars in terms of reliability. 

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Most reliable new medium car: Toyota Auris Hybrid

A number of other medium cars are snapping at the Auris's heels for reliability, with just 2% splitting the top five models, but with a score of 96.4% the Auris Hybrid tops the league.

The hybrid version of the Auris was only launched in 2010. Toyota transferred know-how from the Prius hybrid and applied it to this medium hatchback with good effect. 

We tested the 1.8 VVTi hybrid in 2011 and achieved a remarkable average of 64.2mpg in our fuel economy test - not quite matching the claimed 74.3mpg, but impressive nonetheless.

Note that the Auris Hybrid reported on in the survey was replaced by an all-new model in December 2012. We'll be reporting on the reliability and fuel economy of the new model as soon as we can.

Find out the five-highest rated new medium cars for reliability

Vauxhall Astra

Least reliable new medium car: Vauxhall Astra

The Vauxhall Astra is one of the most popular cars in Britain today. With over 63,000 registrations in 2012, it was only topped by the Ford Fiesta and Focus, and the Vauxhall Corsa, in the sales chart last year.

Unfortunately, the Astra is also one of the least reliable cars, according to our survey. With a reliability score of 81% for diesel models and 79% for petrols, the Astra languishes in the bottom two spots in the medium car reliability table.

Find out the five-lowest rated new medium cars for reliability

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