Isuzu V6 diesel fitted to Saab 9-5 (TiD), Vauxhall Signum and Vectras (CDTi) and Renault Vel Satis. Smooth with huge power when running right; a complete headache when the slightest thing goes wrong. Engines after 2004 (late) were revised and classic problems eliminated such as slipped cylnder liners. If the engine had been as reliable as the VAG 2.5 TDI it would have been a real winner. Easily attains 40 - 50 mpg; not bad for a 3 litre imo.