Thanks to everyone who has contributed to this forum in any way. I am new to Porsche, and am having the normal learning curve anytime such a radical switch of car makes occurs. I thought Mercedes was full of pitfalls, but so far Porsche takes the prize IMO.

Anyway, I have a 2005 CTT, and absolutely love it, in spite of all of the work I must do to restore what doesn't work and add to it to boost performance.

I'll keep it relatively simple for this post, although I realize that some questions may open up Pandora's box anyway. I hope those that have been Porsche Gurus for many years will remain patient while I try to get up to speed!

My questions are these (question #1 is most important):

1. My vehicle did not come with the factory TPMS System. Can I purchase a used module and other parts to install it on my 2005 CTT? If so, what chip flashing must accompany the hardware installation?

2. In general, can this type of parts swap work between various years / models of the Cayenne / CTT?

3. I realize that question #2 is too broad for a specific answer, but wanted to open up a discussion so that I might have a better appreciation for what is / is not possible. Can anyone just weigh-in with their thoughts on inter-year / inter-model parts compatibility and what some possibilities might be?

My ambitions for this vehicle are mostly to wring as much horsepower as possible out of it, while simultaneously inching it back to look, feel, and handle more like new. After spending many hours already, I have a bunch of ideas from all of you on how to go about my quest, and in what order things should happen. I'll surely have many more questions to ask, and hope that I might also contribute help to others, for now perhaps just in general automotive knowledge and working up from there.

Thanks, and I feel very happy and privileged to be among you all.

David Savopoulos

 

PS - just one thing that I found...

There are some rear roller blinds for sale on eBay. Is there any reason they cannot be added after the fact? Does anyone know if any additional parts are needed to install beyond the normal screws / etc.?

 

As for the TPMS I don't have an answer. My 2005 CTT doesn't have it but there is a setting on the display to choose lb or kg. It wouldn't surprise me if you wouldn't be able to install them and have it working. I know I did this with an auto headlight switch. The light sensor was there and once I threw a new $45 switch in I now have auto headlights. Could be the same with TPMS?!?


As for parts compatibility there are likely many parts that continue on through the years. In fact Porsche's part numbering methodology is the part number starts with the first model it was made for. I have seen a couple parts #'s on the 955 that start with 928 or 944.


But having said that I wouldn't bet on all parts being backward compatible from later models to ours. It might depend on programming or a different control module to operate.


For the blinds are you talking about sun shades for the rear doors or something else? I'd imagine you could probably make them fit but I have no idea how they attach to the door. You'd also have to cut the opening in the top of the inside door panel. Might be doable though.


Welcome and enjoy the beast!!

 

#1 - As far as the TPMS - it won't be simple to do. There are antennas and the associated wiring involved plus undoubtedly a module or two. The wiring isn't independent of the main wiring harness of the vehicle. Euro cars don't normally install extra wires in a harness in anticipation of your retrofitting the vehicle with an option later. They build harnesses specific to the vehicles ordered content at the factory. The cost of a new wiring harness for the vehicle in all likelihood would exceed the value of the vehicle. Then there is installation. Long story short - it is unlikely to be economically sound to try to install the factory system. There are lots of aftermarket setups available that are made to be added to a vehicle. That would be much more likely to be affordable and work when you're done installing it.

2. Depends. Tires/wheels are interchangeable. Engines aren't necessarily. And there are two main versions of Cayenne - the 955/957 series (2003-2010) and the 958.1/958.2 (2011 to current) - very few parts are interchangeable between the two series.

3. See 2 above.

4. Power? Can be done, typically at the expense of reliability, drivability, emissions, etc. There is no free lunch for power. Porsche doesn't leave power laying on the table for some aftermarket place to come along and grab up. There is always a compromise for more power - if it was easy and cheap - Porsche would have done it already - power sells vehicles. You can easily buy S class Mercedes less than 10 years old for a tiny fraction of their new price. We're talking 6% or less.. pocket change. There is a reason for that.

5. The sunshades? Usually are power operated - so even if you have the modified door panel to mount them - the wiring/switches/controls/computers won't support them. If you can find manually operated ones you might be able to retrofit them. How well depends on your skillset or how much you're willing to pay a specialist.

Oh - Porsche vs Mercedes? Porsche didn't make balance shaft sprockets out of swiss cheese. Mercedes did. Porsche didn't make biodegradable wiring harnesses. Mercedes did. Out of all the German automakers - Mercedes is currently the worst, and Porsche likely the best. BMW and Audi can battle it out for the middle slots with VW falling in there somewhere.

 

My rear window shades are not power operated.

 

Thanks, all, for weighing-in on the retrofit question. I just bought a great aftermarket TPMS system, to keep things simple. It's called FoboTire in case anyone is interested. Works via individual modules attached to the exterior valve stem of each tire, which transmit to a small unit that can fit wirelessly anywhere in your car. That unit communicates Vos Bluetooth with your smartphone. The whole thing runs on batteries, and the main unit talks to your phone as long as it is in range. You don't have to open the app unless you want to. With the pressure range set by the user, it will alert you if any tires fall outside of "acceptable" range. Wasn't cheap, at $just under $200, but works very well and is SIMPLE to install.

I'll let you all know how batteries last! Also, as I get things restored and upgraded I'll let this forum know. I have great performance ideas just from looking at various member profiles, and plan to start with EVOMs tune, plenum upgrade, and secondary cat bypass.

Thanks again, folks, for your kindness and help!

 

this is a knuckle/wheel carrier for rear wheel drive 911. my car is Carrera4,All wheel will this part still work or I need specifically for All/wheel?