Engine Mechanical Faults VW 118 TSI 1.4-litre engine

The VW 118 TSI 1.4-litre engine in the Golf and Jetta is both a supercharging and a turbocharged engine. This is to help deliver the torque of a 2.0-litre with the economy of a smaller-capacity engine and has been voted international engine of the year, twice. Unfortunately, despite the praises, the TSI engine has a critical weakness with the pistons and ECU software.