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      10-29-2008, 09:59 AM   #1
iBEEM
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Low Tire Pressure Warning

Took the M on a road trip from NYC up to Syracuse this past weekend - fantastic fall drive. When I started it up on Saturday morning (after sitting outside on a cold night) I had a warning that all 4 tires were low. On visual inspection they all looked fine. I drove around a bit - checked the pressure (which was fine) and reset the TPMS with the button on the dash - warning went away and didn't come back.

I'm assuming it was compression due to the cold air, but wanted to see if this has ever happened to anyone else?

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      10-29-2008, 10:05 AM   #2
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You are 100% correct. The sudden drop in temp will affect your tire pressure. It is better to check/adjust the tire pressure during the start of the cold season.
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      10-29-2008, 02:29 PM   #3
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If the pressure is fine then it's probably not the TPMS but rather just the cold air as you've mentioned. If it persists then you might have a TPMS leak.
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      10-29-2008, 04:01 PM   #4
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Happened to me yesterday too. I figured it was due to the cold weather. Thanks for the reassurance.
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      10-29-2008, 07:19 PM   #5
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Same thing happened to me. BMW Service Dept said it was because of the cold weather.

Edit: I just checked my tire presure, and fronts were about 7 psi under, rears 5 psi. I used the M Mobility air cimpressor in the trunk...very cool!
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Last edited by AwesomeM3; 10-29-2008 at 07:49 PM. Reason: Checked tire pressure
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