[raleedy]

During our cold snap this week, the external temperature monitor seems to operate randomly. A couple of 37 degree warnings have been issued, but my previous BMW's warned consistently when the car was started, or whenever the temperature dropped to the threshold. What is others' experience?

[overcoil]

I think my readings are kind of random.
Usually get a reading in the morning and in the evening but during the day it seems not to notify on each start up.
37 Farenhite is the warning limit

[Deutsche-Broke]

I think I got my last warning two weeks ago before we slipped into a deep freeze. Haven't had any warnings since.. I chalked it up to the humorless German model of, "It was cold when you did this before.. You should know by now.."

Not real impressed with the temperature sensor so far, but it could very well be clogged or covered in ice. It's always been very slow to respond and sometimes wildly inaccurate. I'm just hoping that engine management is using a better sensor..

[Maynard]

I think mine dings every time the temp falls below 37; so about a mile from leaving the garage. Not sure if is has been ringing during these cold days where startup is already sub-32, and I suspect it does not. I'll pay attention more - usually2 or 3 chimes for different things (brake, seatbelt, etc). Probably there to warn us of the change, but figures if it was sub-freezing at startup you already know that. And my outside temp seems pretty accurate, when I bother to check it.

[Viffermike]

Originally Posted by Maynard

I think mine dings every time the temp falls below 37; so about a mile from leaving the garage. Not sure if is has been ringing during these cold days where startup is already sub-32, and I suspect it does not. I'll pay attention more - usually2 or 3 chimes for different things (brake, seatbelt, etc). Probably there to warn us of the change, but figures if it was sub-freezing at startup you already know that. And my outside temp seems pretty accurate, when I bother to check it.

This is correct. The warning resets after the car's temp sensor goes back above the 37F threshold. You won't see another warning until the outside temp goes back above 37F and the sensor resets itself.