The 2. T tsi was a fairly reliable engine, but it does have a list of common problems. This article will outline the common vw engine problems and how to detect them. This engine uses direct injection to spray the fuel into the engine’s cylinders. The fuel injectors the piece that sprays the fuel. volkswagen jetta tdi the jetta tdi also has a reputation for reliability. The 2009-2014 models with the 2. Tdi engine are considered solid choices. However, it’s crucial to ensure regular maintenance to keep any tdi running smoothly.