It's a o-ring seal that is replaced on the inside of the rim. If your not currently having tpms problems you should be ok as long as the tire installed does not damage the sensor. Many different types are out there band type ford, and valve stem type most common. Also it will need to be calibrated or recognized by the vehicle once installed. Like on chevy front left front right etc. It's standard procedure for them to replace the seals so you don't have a problem but do you really need it. I would say no.