To measure the frequency of repairs for a particular vehicle, it compared the percentage of reported check engine failures for that model to its share of all 136 million 2002-2012 model-year vehicles on the road.
The previous version ofthe Mazda 6 did not give U.S. buyers a diesel option, and the 2014 model will be one of only two midsize sedans available with a diesel engine stateside, the other being the Volkswagen Passat.