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Old 11-30-2008, 11:14 AM
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X5 Meister X5 Meister is offline
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BMW's in the past had such sensors (particularly some M5 models) and it varies widely among models which system was implemented and when.

What IS known is that E53 X5's from 4/2004 do not have a TPM (tire pressure monitor) strictly speaking. They have a FTM (flat tire monitor) which uses data from the wheel ABS/speed sensors to detect a change between the rotation rate of one tire versus another. A significant difference in rotation rates and the system interprets it as a "Flat Tire."

A TPM uses actual sensors mounted to the wheel to detect actual "Tire Pressures." which were optional on E53 X5's up to 4/2004.

The car must have the electronic module (for FTM) or multiple modules (TPM) for the system to work.

Last edited by X5 Meister; 03-05-2009 at 04:30 AM.
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