2.0 DTI and 2.2 DTI engine: faults and reliability

The 2.0 DTI and 2.2 DTI are four-cylinder direct-injection diesels (hence the «DTi» initials, from Direkteinspritzung) using an electronically controlled Bosch VP44 rotary pump, well before the common-rail systems that Opel would introduce later with the CDTI. The engine code changes with the emissions standard: X20DTH (1997-2000, Euro 2) and Y20DTH (2000-2005, Euro 3) for the 1,995 cc, 100-101 hp 2.0 DTI, and Y22DTR for the 2,172 cc, 120-125 hp 2.2 DTI, with a variable-geometry turbo (VTG) in its more powerful version. The timing is chain-driven, described in the technical documentation we consulted as «wartungsfrei» (maintenance-free).^[1][6][9]

In Spain it was sold mainly in the Opel Astra G (1998-2004) and the Zafira A (1999-2005) with the 2.0 DTI, and in the Vectra B (1995-2002), the Vectra C (2002-2008, only in its early years) and the Signum (2003-2008, only in its early years) with both engine sizes; the Omega B (1994-2003), Opel's large saloon of the period, also used it in its final years. From 2003-2005 these engines were gradually replaced by the common-rail 1.9 CDTI and 2.0/2.2 CDTI diesels.^{[3][4][5][9][10]}

German Wikipedia notes that, in its early years on sale in the Vectra B, this engine suffered recurring failures of the VP44 injection pump and the air mass meter, as well as turbo and oil consumption problems, although it describes the block itself as «robust and durable». A German used-car buying guide focused on the Vectra C, with the engine by then more mature, describes it as practically as reliable as the later 1.9 CDTI, with the EGR valve as the only weakness noted.^[1][2]