Designation and processor
A BRC application listing names Bosch M4.4.2 for a 1997 Renault Safrane 2.5i N7U example. Its processor is not identified in that listing. The 8051 architecture is not independently verified here for M4.4.2; check the specific unit.
Identification and scope
Record the Bosch and vehicle-manufacturer ECU part numbers, engine code, market, year, hardware and software identity. Identify the processor from the specific unit before relying on its architecture. No pinout, interchangeability or programming procedure is established by a family designation alone.