What is the sensor under the car.....

bmwrocks

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#1
What is the sensor under the car between the right wheel well and the bumper? I just read in another thread that the sensor on the left side is the temp sensor for the temp warning.....

The one I mean is about the size of a silver dollar, kinda looks like a plastic plug under there. I know about it because it came out of its holder when I was putting in my hoen fogs. And it was VERY hard to get back in because it secures from the inside.
 
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#2
Its the sensor for how much heat to apply to the rear window defogger, so it knows exactly how much heat to apply.

I had to get that replaced, when I accidentally hit a curb. DAMN those high curbs and high angled driveways
 


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