Removing Wheel Electronics

Valve complete with screw -1 to 7-  has to be replaced if:

Information 

• For vehicles with Tire Pressure Monitoring, the valve and wheel electronics are only replaced in exceptional cases! The following points can make replacement necessary! 

• The wheel electronics unit is removed
• The self-locking -1-  fastening screw is loose
• The bead seat sealing ring -6-  is porous or damaged
• The valve body -7-  is bent
• The union nut -4-  is loose.

The wheel electronics -A-  must be replaced if:

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Wheel electronics unit (shown as an example)

• The housing is visibly deformed
• The filter surface (round, porous section on back of wheel electronics) is so badly soiled that it can no longer be cleaned by wiping
• Tire sealant (tire sealing liquid) has been used
• The service life of the battery is exceeded
• There is a fault inside the wheel electronics unit.

After removal of the tire, the wheel electronics -A-  can be seen at the valve in the outer rim well base.

Courtesy of PORSCHE CARS NORTH AMERICA, INC.

Wheel electronics unit fitted (shown as an example)

1. Release the wheel electronics unit from valve using a Torx socket screwdriver T 20 (if necessary, counter with a suitable assembly pin, e.g. steel pin Ø approx. 1.8 mm in bore at valve foot) and remove it. The new valve comes with an assembly pin. This can also be used for removing the wheel electronics unit.

   Courtesy of PORSCHE CARS NORTH AMERICA, INC.

   Countering TPM valve while loosening

2. Then unscrew union nut and remove valve.