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3-Series (E46, E90) Chat relating to the BMW 3-Series from 1999 to Current. Models include: BMW 316i, BMW 318i, BMW 318Ci, BMW 320i, BMW 323i, BMW 325i, BMW 330i, BMW 328 Ci, BMW 328i, BMW 325i/xi, BMW 330Ci, BMW 320d, BMW 330d, BMW 335d.

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Old 06-30-2004, 09:58 AM   #1 (permalink)
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Just bought a 2000 323ci two months ago and I need advice? The outside tempurature gague is stuck at -40 degrees. Sometimes while i'm driving, the computer will beep and then the -40 will be flashing on the computer. Any idea why? Also, the storage compartment over the ashtray is open and will not click to stay closed...Any idea?
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Old 06-30-2004, 10:36 AM   #2 (permalink)
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I'm pretty sure that when temp is below -38 the car normally beeps at startup to warn of cold temperatures and it automatically switches the heated rear screen on....maybe the beep is linked.
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Old 06-30-2004, 11:11 AM   #3 (permalink)
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When outside temp drops to 3 deg C (37 deg F) or below OBC autmatically displays outside temperature, regardless of what you set it to or what it was set last time and car beeps.
The reason for that to warn driver that outside temperature dropped to the point, that ice can forme on the road surface at certain atmosferic conditions, like bridges, open roads with strong wind, etc....
The fact that outside temperature displayed is -40 deg C (or F) most likely means of a damaged sensor(s) behind splash guard in wheel well. Unless it is really that cold in June, where you live...
It is probable, that your're having problem with your AC, I think outside temp is factored in the logic of AC.
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Old 06-30-2004, 12:12 PM   #4 (permalink)
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I had an outside temperature gauge go out on a 94 Dodge Caravan. Didn't seem like it was that expensive to replace, just a thought.
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Old 06-30-2004, 12:28 PM   #5 (permalink)
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If it is reading -40 degrees all the time the outside temp sensor is most likely toast. It is behind a splash guard on the drivers side, if i remember right. It can sometimes get ripped off in a bad pothole or it may just have gone out. The part is not that expensive and easily replaced.
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Old 06-30-2004, 02:01 PM   #6 (permalink)
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Anyone know if the outside temp sensor is covered by manufacturers warranty?
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Old 06-30-2004, 02:39 PM   #7 (permalink)
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If it is faulty it should be covered by the 4yr/50K mile warranty, if it is missing you will most likely have to pay.
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Old 06-30-2004, 05:06 PM   #8 (permalink)
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remote chance: wire unhooked. it would show minimum temp as it sees no res. mach5: am i smoking crack on this one?

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Old 07-01-2004, 04:21 PM   #9 (permalink)
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Originally posted by peterkulesza@Jun 30 2004, 05:46 PM
remote chance: wire unhooked. it would show minimum temp as it sees no res. mach5: am i smoking crack on this one?

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No you are not smoking crack. The wire could be unhooked and you would get the min. reading on -40. It is however unlikely that the wire would fall off.
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