Flat Tire Sensor on 2006 Weird-Fender Whipped? - Bimmerfest - BMW Forums

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E46 M3 (2001-2006)

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Old 06-06-2008, 10:52 PM
tnlegendracer tnlegendracer is offline
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Location: Springfield, TN
Join Date: Sep 2007
Posts: 35
Mein Auto: 2006 M3 Convertible
Flat Tire Sensor on 2006 Weird-Fender Whipped?

So my wife calls me this afternoon and says the flat tire alarm has gone off but she doesn't see a flat. She parks it untill I get there. It's glowing red, not orange. I check pressure in all four tires. It appears that 5-6 months ago, the local dealer lowered my tire pressures from te max recommended on the sidewall (where I keep them), to 30 lbs in each tire. Whatever. We drove 8 miles on home.

Here's the weird part, the right front fender lip looks like the tire has spun something on several rotations and it "whipped" the paint around the fender lip pretty good. I hope it buffs out. There'sno marks on the outer sidewall of the tire or tread. I haven't had time to look under it yet, but I'm wondering: Is it possible the flat tire sensor somehow got whipped around the outer tire and beat the snot out of the fender then got gone? I know this sounds nuts, but I don't know how it works and that tire/wheel whipped that fender with something.

Anybody able to offer any pointers?
2006 M3 Convertible SMG
2006 325i
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Old 06-10-2008, 12:15 PM
///MMM ///MMM is offline
you are a long time dead
Location: BC canada
Join Date: Nov 2007
Posts: 33
Mein Auto: 2004 M3 SMG vert
there is no pressure sensor in the strictest sense...it is an ABS related sensor that detects a different rotation of a wheel that suggests that the tire is under inflated....it can be triggered by a real low tire or by driving over a pothole or similar road hazard. The marks on the bodywork are not related to this...
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Old 06-10-2008, 02:48 PM
Bruce Bruce is offline
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Location: Lake Tyler, Texas
Join Date: Dec 2001
Posts: 2,291
Mein Auto: 88 E30 M3.2, 08 451
Inflating your tires to max pressure is NOT a good idea. Go by the tire inflation guide on the sticker in the door jamb.
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