Last February the National Highway Traffic Safety Administration (NHTSA) opened up an investigation into failing fuel pumps in some Volkswagen and Audi diesel cars. Today, the NHTSA announced they will be intensifying the investigation after receiving over 150 complaints. The vehicles involved in this investigation include the 2009-2010 Volkswagen Jetta, 2010 Volkswagen Golf and 2010 Audi A3 vehicles. If the investigation should lead to a recall, nearly 100, 000 vehicles could be involved.

Last may, VW issued a service bulletin telling dealers to inspect the diesel fuel requiring fuel system service associated with fuel pump failure, suspecting the problem is with contaminated fuel. According to VW, even small amounts of gasoline in the diesel may disrupt lubrication, leading to fuel pump failure. They told the NHTSA that they were unable to find a defect related to motor vehicle safety with relation to the TDI clean diesel fuel system.