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    TPMS feature - Boon or Bane?

    I am considering to include this nifty option in my 997C2S order but am rather discouraged by my dealer. They claimed that the TPMS system is very sensitive to pressure changes (which I thought was a virtue) but it kept throwing error messages when the car is taken on long highway drives and track driving. Is it true that the ideal pressures are preset at the factory and it cannot be tailored/fine tuned to our specific climate conditions in different countries/seasons? Can we preset the low pressure warning parameters? Hope someone can shed some experience here. Thanks in advance.

    Re: TPMS feature - Boon or Bane?

    Quote:
    Avant said:
    I am considering to include this nifty option in my 997C2S order but am rather discouraged by my dealer. They claimed that the TPMS system is very sensitive to pressure changes (which I thought was a virtue) but it kept throwing error messages when the car is taken on long highway drives and track driving. Is it true that the ideal pressures are preset at the factory and it cannot be tailored/fine tuned to our specific climate conditions in different countries/seasons? Can we preset the low pressure warning parameters? Hope someone can shed some experience here. Thanks in advance.



    I heard the same thing by my dealer before I ordered my car. But this was before TPMS was even available on the 997. You might want to ask your dealer if they know this is really true today or are they basing this on some previous version of TPMS (was it available on the Cayenne?)

    Re: TPMS feature - Boon or Bane?

    TPMS now seems to be working perfectly!!! I've ordered it after people on this site have said it workrd great.
    Check the previous threads

    Re: TPMS feature - Boon or Bane?

    My dealer had warned against getting this option as they said that the Cayennes faced alot of the many problems with TPMS. An audible alarm will be alerted if the pressure was only slightly off the factory spec. They ended up disconnecting the TPMS on most of the cars.
    Why would Porsche include a feature that they have not thoroughly R&D?

    Re: TPMS feature - Boon or Bane?

    <Why would Porsche include a feature that they have not thoroughly R&D?>
    Now, that can open a very large can of worms. can you say recall. can you say redesign. can you say rms ?

    Re: TPMS feature - Boon or Bane?

    I say go for it. Anyway after 2006 all cars are mandated to have TPMS. As for the fluctuation in pressure, go to Costco and fill your tires with nitrogen gas.

    Re: TPMS feature - Boon or Bane?

    Quote:
    peecarfan said:
    <Why would Porsche include a feature that they have not thoroughly R&D?>
    Now, that can open a very large can of worms. can you say recall. can you say redesign. can you say rms ?



    In the case of TPMS, if it doesn't work reliably, they can always not offer it (as in the case of 2005 997's) as it is an option or feature. RMS is different because they can't fix it AND they can't not offer it.

    Re: TPMS feature - Boon or Bane?

    You'd think dealers would actually make sure about the things they sell before they open their mouth...

    The TPMS on the 997 works flawlessly, very accurate, and never any type of error message. But the bottom line is, its a cheap option that is extremly useful once you start to use it, but ITS NOT retrofitable later on, so if it does work (and it does I speak form experience, MY2005 997S) and you don't get it... too late.

    I ordered it before anybody I knew did and was not sure if the 997 version worked as advertised or not, since no one knew, but I took the gamble since its not retrofitable and the worst that could happen is loss a few hundred $ in the option.

    Re: TPMS feature - Boon or Bane?

    Quote:
    Avant said:
    I am considering to include this nifty option in my 997C2S order but am rather discouraged by my dealer. They claimed that the TPMS system is very sensitive to pressure changes (which I thought was a virtue) but it kept throwing error messages when the car is taken on long highway drives and track driving. Is it true that the ideal pressures are preset at the factory and it cannot be tailored/fine tuned to our specific climate conditions in different countries/seasons? Can we preset the low pressure warning parameters? Hope someone can shed some experience here. Thanks in advance.



    I have TPM on my 06 S and think it is a must have option. Just a few days after I got the car I notice the TPM was indicating the right rear was lower by 2 lbs. Next morning it was 4 lbs. lower, later that day the visual alarm showed up on the dash. I took it in thinking it was an error message with the TPM but I had a nail in the tire. With such a low side wall it is really hard to tell visually if a tire is low.

    I drove the car 200 miles yesterday through the Central Valley (California) with 106 degree temperature. The pressures increased by 2 lbs. from normal, once I hit the cooler San Francisco Bay Area, the pressure came back down. I can also watch the pressure raise and fall with my driving. Leisurely pace with normal ambient temps I run 37-38 lbs front 43-44 rear. If I push it they go up 2-3 lbs. This is a great option.

    Re: TPMS feature - Boon or Bane?

    TPMS on my 997 works well but if it doesn't I would go to a Porsche dealer and have them sort it out under the warranty.

    Re: TPMS feature - Boon or Bane?

    Sounds like a great option, Gary. I wish that I could have ordered it. Oh well, I guess I'll have to check my tire pressures the old fashioned way and more often.

    Re: TPMS feature - Boon or Bane?

    Quote:
    Carlos from Spain said:
    But the bottom line is, its a cheap option that is extremly useful once you start to use it, but ITS NOT retrofitable later on, so if it does work (and it does I speak form experience, MY2005 997S) and you don't get it... too late.

    I ordered it before anybody I knew did and was not sure if the 997 version worked as advertised or not, since no one knew, but I took the gamble since its not retrofitable and the worst that could happen is loss a few hundred $ in the option.



    Very credible indeed! I shall also take the gamble and order it, its only going to cost some money, not an arm or leg. If it does not work, what the heck! I trust the option can be shut off so that we do n ot see the audible error/signals.

    Re: TPMS feature - Boon or Bane?

    Got it in my 06 c2s. You can fill the tires to any pressure you want, all the units will do is tell you what those pressures are. It wil also tell you which tire is off by how much from the others. It compensates for temp changes. IOW, it tells you the actual pressures of the tires as they change. The alarms are of two degrees, "gentle warning" (something like "air pressure low, add air") and "stern warning (something like "add air now!").

    Sounds like your dealer is working with outdated info. Get it if only to save your wheels and tires from damage. I'm thinking that it would be really hard to be so on top of things all the time as to be able to sense when the one tire is really low (incase of puncture).

    BTW, I plan to have simple tread punctures patched and plugged (like normal cars) since I don't travel at sustained Autobahn speeds.

    Re: TPMS feature - Boon or Bane?

    Quote:
    Avant said:
    My dealer had warned against getting this option as they said that the Cayennes faced alot of the many problems with TPMS. An audible alarm will be alerted if the pressure was only slightly off the factory spec. They ended up disconnecting the TPMS on most of the cars.
    Why would Porsche include a feature that they have not thoroughly R&D?



    My dealer told me about similar experiences they had but when you listen to the details of the complaints it's really not a problem with a malfunctioning TPMS. Owners who are complaining are just not accustomed to keeping a correct amount of pressure in their tires. I have a Cayenne S built in July 2003 so it has the first version of the Cayenne TPMS system. I have had it over two years and there have been no malfunctions.

    I often pickup my car from the dealer after service and I get TPMS warnings about incorrect pressures. In fact, every time the dealer has done anything with the tires I get the warnings. This isn't because of a malfunction of the TPMS, it's just a dealer that doesn't know what pressure to put in tires. The last time I picked up my car I insisted on checking pressure before I left, since I had had the tires rotated and balanced. Sure enough, air pressure was wrong in all four tires. The mechanic that did the work couldn't understand it since he had carefully adjusted the pressure to 40 psi in each tire. I explained to him that this was the problem; 40 psi was too much in the front but not enough in the rear and why couldn't he just look at the sticker on the door to see what the correct pressure should be. I got a blank stare.

    I think TPMS is a great feature and I highly recommend it. When I go off-road and air down the tires I just turn the system off so I don't get the warnings. When I get back on the pavement I air up and turn the system back on. In living with it day to day I just correct the pressure when I get a warning and everything's fine. I have never had an incorrect message or warning from the system.

    Re: TPMS feature - Boon or Bane?

    Quote:
    GM Austin said:
    My dealer told me about similar experiences they had but when you listen to the details of the complaints it's really not a problem with a malfunctioning TPMS. Owners who are complaining are just not accustomed to keeping a correct amount of pressure in their tires. I have a Cayenne S built in July 2003 so it has the first version of the Cayenne TPMS system. I have had it over two years and there have been no malfunctions.

    I often pickup my car from the dealer after service and I get TPMS warnings about incorrect pressures. In fact, every time the dealer has done anything with the tires I get the warnings. This isn't because of a malfunction of the TPMS, it's just a dealer that doesn't know what pressure to put in tires. The last time I picked up my car I insisted on checking pressure before I left, since I had had the tires rotated and balanced. Sure enough, air pressure was wrong in all four tires. The mechanic that did the work couldn't understand it since he had carefully adjusted the pressure to 40 psi in each tire. I explained to him that this was the problem; 40 psi was too much in the front but not enough in the rear and why couldn't he just look at the sticker on the door to see what the correct pressure should be. I got a blank stare.





    I think you have hit the nail on the head , the problem lies with most driver who careless about their rides and the numbskull mechanics who has got no idea about the sensitivity with new technology.
    Thanks for your most valid feedback

     
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