When one gets new tires, do I need to change the batteries in the tire monitoring system or get new units. Never had this before. ty

 

they should be fine to just switch over...
when I added my new wheels, they just took them off and stuck them on the new ones.....very easy from what I could tell.....don't know about how they jiggered them back with the system or if it's auto.......
the dealer will know

 

Some specialist like to replace the stem assembly. If it ain't broke...