– An essential resource for understanding the resistor modifications required for flashing the M7.9.7 and M7.9.7+.

On many M7.9.7 variants, special "lay-by" pins located on the lower part of the unit's board must be connected to a programmer. bosch m797 pinout better

Disclaimer: Always verify your specific vehicle variant. Pinouts vary by OEM software lock. When in doubt, consult a factory wiring diagram. – An essential resource for understanding the resistor