I’ve always been one to sing the praises of diesel vehicles. North America has been hesitant to embrace them, but diesel cars tend to be more efficient and pack quicker acceleration. Unfortunately, it’s not always so bright and rosy. A number of Volkswagen and Audi owners have been reporting premature fuel pump failures in their diesel cars, enough to have prompted an investigation by the National Highway Traffic Safety Administration into the 2010 Audi A3, 2010 VW Golf, and 2009-2010 VW Jetta diesels.