Removing Wheel Electronics

WARNING: This page does not describe the selected car, but rather 9 other vehicles, including the 2013 Porsche 911, 2012 Porsche 911, 2011 Porsche 911, 2010 Porsche 911, and 2009 Porsche 911. However, it is still accessible from the selected car via links, so may be relevant.

Information

For vehicles with a tire pressure monitoring system, the valve and wheel electronics are only replaced in exceptional cases! The following points can make replacement necessary!

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

Fig 1: Identifying Valve And Wheel Electronics With Screw

Courtesy of PORSCHE CARS NORTH AMERICA, INC.

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:

Fig 2: Identifying Wheel Electronics

Courtesy of PORSCHE CARS NORTH AMERICA, INC.

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

Fig 3: Locating Wheel Electronics Unit

Courtesy of PORSCHE CARS NORTH AMERICA, INC.

Release the wheel electronics unit from the 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.

Fig 4: Locating TPM Valve
Courtesy of PORSCHE CARS NORTH AMERICA, INC.
Then unscrew union nut and remove valve.