J.D. Power has released its annual 2010 Vehicle Dependability Study which measures the problems experienced by owners of vehicles built three years earlier - in this case 2007.
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Some rather unlikely contenders topped the survey, while long-time reliable favourites didn't fare so well in real-world comparisons.

At the top of the list is Porsche, which sells fewer cars in a year than industry leaders sell in a week, followed by Ford's US domestic brands which all made an appearance amongst the top eight.

Jaguar fell from first place in 2009 to the number 23 spot, following a trend which saw only two of the European brands score better than the industry average of 155 problems per 100 vehicles.

The brands most commonly stereotyped as poorly built defied their public perceptions to rank within the study's top 12 - they were Cadillac, Ford, Hyundai, Lincoln and Mercury.

“It takes considerable time to positively change consumer perceptions of quality and dependability -- sometimes a decade or more,” said David Sargent, vice president of global research for J.D. Power. “So it is vital for manufacturers to continually improve quality and also to convince consumers of these gains.”

According to the survey, the Cadillac DTS was rated the industry's most trouble-free vehicle, with just 76 reported problems per 100 vehicles.

At the lower end of the spectrum all but seven brands scored below 200, with a few manufacturing heavyweights among them.

Below is the full list for the 2010 Vehicle Dependability Study, a lower score means better quality.

Porsche 110
Lincoln 114
Buick 115
Lexus 115
Mercury 121
Toyota 128
Honda 132
Ford 141
Mercedes-Benz 142
Acura 143
Hyundai 148
Cadillac 150
Infiniti 150
Subaru 155
Industry Average155
Saab 158
Saturn 164
BMW 165
GMC 165
Chrysler 166
Kia 167
Volvo 167
Hummer 169
Jaguar 175
Chevrolet 176
Nissan 180
Audi 182
Dodge 190
Pontiac 192
Mazda 195
Scion 201
Mitsubishi 202
MINI 203
Jeep 222
Volkswagen 225
Suzuki 253
Land Rover 255