M54

The BMW M54 is a straight-6 DOHC piston engine which replaced the M52 and was produced from 2000-2006. Compared with its M52 predecessor, the M54 features electronic throttle control. The M54 uses an aluminium block and aluminium cylinder head with cast iron cylinder liners and like the technical updates variants of the M52, the M54 features variable valve timing for intake and exhaust valves.