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      07-27-2005, 04:56 AM   #2
onesixeight
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Drives: E92 M3
Join Date: May 2005
Location: Seattle, WA

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Yes, there are no sensors on the wheels itself. The sensors are based of data from the DSC & ABS sensors that measure the rotational speed of the diagornal wheels (ie. RF/LR). BMW TPMS system will not tell you the pressure in the tires.

According to Continental Teves (supplier of DSC system), the warning will come on if there is a drop of 9-21 psi.