The TPMS sensor is attached to the valve stem. The unit sends the tire pressure to the on board computer system which turns on the warning light if you have a low tire. Any decent tire shop should be able to handle fixing a flat tire on a vehicle with TPMS as it has been around for several years.
Here is a link to a Wikipedia article on how it works:
http://en.wikipedia.org/wiki/Tire-pr...itoring_system
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Wayne
2008 2WD Limited Blizzard Pearl, Towing Package / Hitch
Mods: Formula 1 Ceramic Window Tint, SportWing Bodyside Moulding, SmittyBuilt Hitch Step, SilverStar Ultras, AVS Bug Shield, Wong's Neoprene Inserts, MGT V-1 Mirror Mount, JDM Horns, Toyo P245/55R19 Open Country H/T
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