Bumped the right fron end when doing U turn..Now the external temperature reads -40 DEG C.
Sounds like the ambient temperature sensor is either disconnected or damaged. Look for it under the hood in front of the radiator just behind where you bumped the car. HTH. -Jim
Search this on bimmerfest.com. This is a fairly common issue. Your temperature sensor probably got crushed.
This IS the external temperature sensor, right? " In front of the radiator " ?
Yes, the outside temperature sensor.
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