The fourth generation of BMW 5 Series was introduced for the 1997 model year. Known as the E39, the fourth generation 5 Series was offered as a sedan or a station wagon. The E39 was offered with inline 6 and V8 gasoline engines, as well as inline 4 and inline 6 diesel engines, although no all wheel drive variant was produced. Notable variants for the fourth generation 5 Series include the 520i, 540i, 535i, 530i, 528i, 525i, 525d, 525tds, 523i, and the performance focused M5. Built until 2004, the E39 was replaced by the E60 5 Series in 2004.