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DIY: Do It Yourself
Post here to share or improve your wrench turning skills! All BMW E46 DIY tips, tales, and projects discussed inside. Learn to work on your car and know the right BMW parts you will need!

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Old 12-23-2007, 09:58 AM   #1
WannaRace
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In car thermometer problem?

Hey fanatics, I was just wondering if any one here could help me?

My in car display for the thermometer (exterior temperature) has gone crazy, it bounces back and forth between -40 degrees F and +122 degrees F then lately it has been jumping all over the place. Is there a simple fix to this or is it something I should be taking into the dealer?

Honestly it probably wouldn't bother me that much except for the fact that as most of you know when the temperature drops below a certain number, which I think is +37 degrees F it makes this loud high pitched "BEEP" noise so my car is making this noise almost constantly!!!

AHHH SOMEBODY HELP ME PLEASE!!!
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Old 12-23-2007, 10:03 AM   #2
russ330
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The sensor is broken, you'll need to replace it. I don't know how much it'll run, but I doubt it's that expensive.
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Old 12-23-2007, 05:57 PM   #3
WannaRace
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Thanks for the input, I'm gonna pick up the sensor from the dealer!

I ended up searchin around a little more into the problem on here, and found out where the sensor is located and sure enough the splash gaurd and the sensor was torn off!!! You gotta love Chicago winter snow storms!

Yeah I'm almost postive I now exactly where it happened too, but whatever gotta take care of it now!
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Old 12-23-2007, 06:45 PM   #4
mkodama
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Yep, external temp sensor. Previous owner broke it off on my car and never fixed it

When the temp sensor wires are shorted, they will read 122 and when they aren't connected they read -40.
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Old 12-23-2007, 10:51 PM   #5
WannaRace
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Exactly right I had a chance to get under the car and see that the sensor was gone, and for now I just taped off the exposed wires and tucked em up in the bumper again and now the display just reads -40F so at least the beeping stopped!
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Old 12-24-2007, 02:47 PM   #6
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the splash guard is about $45 from Pelican Parts (www.realoem.com) and is a pretty easy install - I did it on both my cars, sadly The thermometer just snaps right into its housing on the splash guard/fender liner piece.

GL!
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