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      01-03-2013, 08:34 PM   #5
4corners
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Drives: 2008 Jet Black M3 Coupe
Join Date: Feb 2011
Location: Yucca Valley, CA - Kelowna, BC

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2008 BMW M3  [0.00]
2007 Ford E350 4x4  [2.75]
Quote:
Originally Posted by MasterofGoing Faster View Post
How is it that each tire has a TPM sensor yet BMW cannot display which tire it is that is going down? In my 2012 E92 M3, whenever 1 tire drops, the TPM indicator shows all 4 tires faulted. At first I was told by the dealer that this indicated a speed sensor failure. I later saw for myself that each tire has a sensor within so it must not depend on sensing wheel speed. Why then does the reset procedure require you to roll off before it re-calibrates? Is it using a wheel speed sensor or tire pressure sensor? Despite what the manual says, they included a single sheet manual addendum indicating to ignore the manual ... when there is a low tire, the indicator will display all 4 tires as being low. Is this a special feature only applicable to M3s and why?
My M3 shows exactly which tire is low. Right front, left rear, etc..
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