Learn when TPMS sensor replacement is needed, how sensor modes work, and tips for troubleshooting signal issues in the shop.

Unlike other parts on your car, Tire Pressure Monitoring System (TPMS) sensors have their own battery, which means they eventually die. How much is a new one?

But, the Dorman TPMS (PN RNB-974-009) come with metal valve stems and are a fraction of the cost of the GM sensors at under $31. So I figured we’d give them a shot in the name of science.