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Top 5 unreliable car manufacturers

Worst performers in the 2010 Which? Car Survey
Broken down car being towed by truck

Find out which carmakers ranked lowest for reliability in the 2010 Which? Car Survey

As well as naming the best carmakers for reliability, the Which? Car Survey also reveals those at the other end of the scale, who have the worst track record.

Last year, more than 64,000 owners filled in the Which? Car Survey, making the survey the biggest of its kind.

The feedback we receive from owners allows us to generate our league tables of the best – and worst – cars for reliability in each class.

The Which? Car Survey takes into account reliability ratings for both newer cars (0-3 years old) and older cars (4-8 years old) to give an overall reliability result.

Below are the results of the 2010 Which? Car Survey for the five least reliable car manufacturers.

Read the top 10 reliable car manufacturers here or read all of our reliability data here

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Top 5 unreliable car makers

Land Rover

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Land Rover

Reliability score: 68%

The British carmaker was once known for bulletproof reliability, but modern Land Rovers are no longer in the same league as German or Japanese rivals. Older cars anchor the reliability rating down with a score of just 61.5%. Newer cars show a slight improvement with 76.6%, but running costs for a year are high. You also told us last year that your Land Rovers spend almost two days a year off the road due to reliability issues.

Read all our Land Rover reviews here

Chrysler

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Chrysler

Reliability score: 68%

Chrysler suffers badly in the older car reliability standings, with a low 64.8% average overall. That means the American manufacturer was once again in our top five last year. You also told us that maintenance and service costs were extremely high – so much so that only a Jeep or Porsche would be more expensive over a year of ownership. Annually, expect a Chrysler to be off the road for an average of one and a half days.

Find all Chrysler Which? Car reviews here

Alfa Romeo

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Alfa Romeo

Reliability score: 69%

It’s no shocker to see the Italian carmaker among this list. It’s widely accepted that anyone who buys an Alfa Romeo does so with their heart instead of their head. Older models score a low rating of 65.2%, dragged down by disappointing scores for the 156 and 147. However, according to your feedback, garage bills aren’t as high as you may first have thought – they’re on a par with Audi and Lexus.

All Alfa Romeo car reviews can be found here

Jeep

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Jeep

Reliability score: 71%

Jeep is the sister company of Chrysler, and it appears poor reliability is a common characteristic of the two. The brand is renowned for its tough-looking 4x4s, but don’t be fooled by those butch exteriors. Older models like the Cherokee and Grand Cherokee suffer with poor reliability scores, dropping the average older model rating to 67.9%. Servicing costs are comparatively high too – only a Porsche will cost more to maintain over a year.

Which? Car Jeep reviews here

Renault

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Renault

Reliability score: 71%

Renault failed to shrug off poor reliability ratings from owners in 2010, in spite of promises to the contrary. Newer car reliability isn’t the issue, with a rating of 85.8%. However, older cars score just 61.9% – the lowest rating bar Land Rover. You also told us that servicing and repair costs are high, especially considering Renault is such a mainstream brand.

All Renault reviews from Which? Car can be found here

 

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