M73

1994–2002•12 cyl•V12•Al / Al

← Predecessor: M70

Successor: N73 →

• Single ECU (instead of two) • Larger 5.4 L displacement • Improved cooling system

The BMW M73 (1994–2002) evolved the M70. Displacement increased to 5.4 L, new cylinder heads with revised intake ports, single Bosch Motronic M5.2 ECU, improved cooling, and updated alternator. Power 326 hp. Used in E38 750i, E31 850Ci. More reliable and simpler than M70, yet retains legendary smoothness. Valve cover gaskets and oil pump issues occur, but overall a robust engine. Can exceed 350,000 km.