E9x M3 Thermostat

Issue:
A common fault we're seeing in the Engine ECU (DME) for the S65 engine related to Thermostat issues where the Thermostat is likely 'sticking open':

Affect:

2B59 - DME: Coolant Thermostat Monitoring.
2B5A - DME: Plausibilization, Oil Temperature At Oil-Connection Sensor.
2AF9 - DME: Coolant Temperature Sensor.

Symptoms

Solution: