Reply With QuoteAny chance of a pic?
2 Grand Master
Sensor ID? M50
What is the sensor on the passenger side, top of the radiator, on an obd-i m50? I just noticed that mine is disconnected, and the 3 prongs that plug into it are hanging beside it. I can't remember if it was like that when I bought it, so I am hesitant to re-attach it if it's not necessary.
Major Contributor
Any chance of a pic?
2 Grand Master
Its a temp switch. I thought it was related to AC function, but could be wrong. As I deleted my AC, I'm not sure what the consequences (if any) are of leaving it hangingFeel free to re-attach it, can't see it harming anything.
Dave
10/90 Build 525im, 630,000+km, Eibach/Sachs, Engine Rebuild
*RIP Oskar the DOG*
Big Time Poster
It is a coolant temp switch to turn on the electric fan. Sort of a fail safe for cars with a/c. If the coolant temp gets past 100 or so C it will come on, past 110 or 115 it should kick to high speed. If your electric fan comes on all the time, the switch has failed in the on position. I'd leave it plugged in, if your clutched fan fails, the electric one should help.
2 Grand Master
cool. I had some abortive work done on my ac earlier this year, and the ac fan is frozen solid in place - is this the fan that relates to this sensor? It would explain some things. thanks for the quick answers guys.
Big Time Poster
Yes that's the fan. The magnets like to come apart and seize the fan, mine was like that when i bought the car.
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