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My car is an o5 CTT. I am the second owner. I had my instrument cluster replaced because the turn signal clicking sound and the door alarms were inaudible. I should have done the due diligence checks when I was given possession of the vehicle but did not. Now, almost a year later, as I cycled through the settings, I noticed that the TPMS option that I used to come across when changing the settings was now gone.

Now I know my car does not have TPMS, but I used to see a graphic with the 4 wheels and dashes next to each wheel, for tire pressure I assume. It would not do anything but it was there. I also seem to recall that there was another menu tree that I could access prior to the replacement but can't be sure what it included.

I am not sure if this is an issue or if I have been short changed some options now. Any ideas why I would see a TPMS graphic if I did not have TPMS in the first place? I have gone through the codes in the trunk and it does not mention TPMS as an option when it was purchased. I hope I am not losing my mind.

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On a 2005 car, TPMS may have been an option rather than a standard feature. I think it became standard in 2007. That said, look at your tire valve stems where they stick out of the wheel; if they are metal and have a nut below the fill cap, they are TPMS sensors. If they are just black rubber, your wheels have no TPMS sensors in them:

Tire%20Valve%20Stem%20Tool.jpg

800px-Tire_valve_stem-cap_off.jpg

It is entirely possible that you had a dash with the option for TPMS included in it originally, and now do not.

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Thanks JFP! I checked my wheels and I have the rubber stems as I expected. It makes sense that the new instrument cluster may not have the option included. Just scratching my head why it would have been included in the original cluster if the option was not part of the package. A Friday car maybe ;-)

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Thanks JFP! I checked my wheels and I have the rubber stems as I expected. It makes sense that the new instrument cluster may not have the option included. Just scratching my head why it would have been included in the original cluster if the option was not part of the package. A Friday car maybe ;-)

At one time, Porsche tended to put unactivated options in cars simply because is was less expensive to do so. A good example is the fact that all early 986 Boxsters had the on-board computer in them, but cars that were ordered without the option did not have it activated or the extra stalk behind the steering wheel. By adding the stalk, and turning on the option in the DME, you actually saved money over ordering it in the car. Was also a favorite mod for used Boxsters.

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