Thread: TPMS Question
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      11-08-2012, 02:14 PM   #9
techy1
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Drives: 2008 328i
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Quote:
Originally Posted by Matrixolution View Post
it's actually the FTM that is feeding the system the alert..

TPMS reports the actual tire pressure (an actual device inside the wheel).
FTM monitors the tire rotational speed against the other 3 in order to determine if you have flat tires or not.

One way to know for sure if you have TPMS is that if you have metal stems, you have TPMS, if you have rubber stems, you have FTM.
thanks for the info! lol I was so convinced i needed them... thanks for saving me some $$!
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