What Happens When you do not Service TPMS Sensors?

Many vehicle manufacturers as well as USTMA, state that the valve stem components are replaced every time the tire is serviced on vehicles with TPMS.

“Always remove and replace used snap-in valves when replacing tires. When new tires are installed, it is recommended to also replace all components that are included in the TPMS valve replacement kit.”

Source: U.S. Tire Manufacturers Association www.ustires.org/sites/default/files/USTMA_TISB_40.pdf

New v Worn Grommets

 

Corroded threads
Corroded threads
Cracked nut
Damaged valve

 

Typical Components Found in TPMS Repair Kits

Typical Components Found in TPMS Repair Kits

 

Reasons For Proper Sensor Service and Repair

 

Valve compenents

The OEM requires that the valve stem components are replaced every time the tire is serviced on vehicles with TPMS

Valve compenents
Clamp-in Kit Component Replacement Reason Result
(A) Grommet/Seal Crack, deteriorate and leak over time Leak path at valve stem
(B) Hex nut Plating worn off, threads corrode Leak path at valve stem
(C) Valve Core Nickel plating strips leading to galvanic corrosion and seized valve cores Leak at valve core, potential broken valve stem
(D) Valve cap w/seal Valve cap seal wear Allows moisture into core
(E) Metal Washer (some applications)(A) Grommet/Seal Washer conforms to rim during installation Leak path at valve stem
Snap-in Kit Component Replacement Reason Result
(F) Rubber TPMS snap-in valve Crack, deteriorate and leak over time Leak path at valve stem

 

Refer to manufacturer’s specifications for proper torque requirements when replacing hex nuts and valve cores.