The German Technical Inspection Agency, TÜV, says the Porsche 911 is the most trouble-free vehicle of this century.

Calculated from data collected from approximately eight million technical inspections between June 2010 and June 2011, the agency found that the Porsche 911 has been the car with the fewest reported defects of vehicles built since 2000. This is regardless of the kilometres travelled by the vehicles.

Before any vehicle model is added into the rankings, it has to have been inspected at least 500 times. TÜV has found that in the 10- to 11-year-old category for the 2011 report, the Porsche 911 had the least faults with a fault rate of 8.3 per cent, followed by the Toyota RAV4 (10.5 per cent), and then the Porsche Boxster (11.2 per cent).

In the eight- to nine-year-old vehicle category, it's the Porsche 911 out in front again, with a fault rate of 8.3 per cent, followed by the Porsche Boxster (9.8 per cent), and the Toyota RAV4 (10.2 per cent).