Almost a decade later, the 2015 Passat represents a real bargain for those who are willing to look past the scandal. On-board the 2015 Passat TDI, you’d discover a high-quality, if somewhat simple, interior. So, it's easy to see why pre-scandal customers loved the Passat TDI for its understated luxury and capable performance. The Quietly Efficient Drivetrain2015 Volkswagen Passat TDI engine Cars and BidsAt the heart of the 2015 Passat TDI sat the EA189 2.0-liter turbocharged diesel inline-four. The Value Play In The Used Market2015 Volkswagen Passat TDI rear quarter Cars and BidsWhen Dieselgate hit, everything changed.