M5.2.1 - Overview - 5-Series, 7-Series: M5.2.1: Notes

Models: E38 with M73/M73TU Engine E38/E39 with M62 Engine 

Production Date: E38 with M62 Engine 5/97 Through 98 MY 

E39 with M62 Engine 9/97 Through 98 MY 

E38 with M73 Engine 5/97 Through 98 MY 

E38 with M73TU Engine 99 MY to Present 

Manufacturer: Bosch 

Pin Connector: 134 Pins - 5 Modular Connectors (2 ECMs on M73)