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Vorsprung durch Technik German cars among the least reliable.
Image Copyright Bentley Legend of the image of Bentley models - owned Volkswagen Germany - were among the least reliable, the survey said.
German cars are among the least reliable, and among Japanese cars as a more reliable industry study ,.
German manufacturers have taken four of the six seats down in a reliability table based on the experiences of 50,000 car owners in the UK.
In contrast, Japanese manufacturers have four of the top six places.
The findings go against the traditional reputation of Germany for engineering excellence.
This reputation has been used by Audi in its online advertising management of Vorsprung durch Technik - or progress through technology.
Bentley luxury car maker, Volkswagen of property was considered the least reliable of 37 brands, research by What Car and Warranty Direct.
Mercedes, Audi and Porsche were also among les six.
Image copyright Honda models Honda Image Caption are the most reliable, according to the survey.
Top of the table was Honda, with Japanese manufacturers Suzuki, Toyota and Mazda in the top six.
The success of Honda in the reliability index is mainly to low failure rate, said Jim Holder, editor of What Car Chief.
However, when things go wrong, the cars are relatively cheap to fix.
The reliability index is calculated based on the frequency of a car should be repaired and how these repairs are costly.
Luxury cars can therefore derive worse in the table, the spare parts can be more expensive.
Bentley said that the investigation was unfair because it covered less than 4 Bentleys on the road, and did not include comparable luxury brands such as Rolls Royce, owned by BMW.
Investigation officials said there were too few Rolls Royce on the road to provide statistically reliable data.
The cost of owning and maintaining a Bentley will not be directly comparable with the other cars in this investigation, said a spokesman.
Vorsprung durch Technik German cars among the least reliable BBC News, Vorsprung, durch, technik, German.