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      06-08-2012, 09:40 AM   #3
Drives: 2008 E90 M3
Join Date: Aug 2011
Location: Edmonton

Posts: 445
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Canadian cars use wheel speed sensors to determine if tires are low as tires with different pressures will differ slightly in rotations per km. As far as the wheel package is concerned, TPMS is attached to the valve stem. Without TPMS, chances are the wheels have a normal valve stem. Nobody would mount tires on wheels without valve stems, it would be impossible to seat the tire bead on the rim.
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