Indeed, among the cars owned by its policy holders, the only engines to have failed more than Audis were those from the now defunct MG Group. In total 1 in 13 of MG Rover motors failed in the past year, and problems presented themselves in 1 in every 27 Audi engines. Mini was the third least reliable with a failure rate of 1 in 40, while BMW finished seventh (1 in 45) and Volkswagen ninth (1 in 52).