I was told the sensors for this option are located within the tire on the wheel and are wireless. So, if this is true, and I take the stock 18" wheels off and add some OEM 19" off an 2005 with the same option, will my tire pressure monitoring option still work? Thanks everyone.

yes they will. just make sure you instruct the tire shop you bring it to to transfer the TPS for you. i just had volks put on and they have the TPS in them. work perfectly

very cool. I did't know you can transfer that transmitter onto any wheel. I thought
it was part of the valve, but I guess not?

What if I install a set of 19" OEM Wheels that have the sensor already in them from another car? Will my system work with another cars sensors? I plan on purchasing some 19" wheels with the sensor still in them and just swapping the wheels myself.

You'll need to take you're car to the dealer and have them reprogram your car to listen to the new TPS.

Half true. They are part of the valve stem assembly. The problem is, they won't fit just any wheel. The wheel needs to have the clearence for them. They don't fit my Work Meister S2R rims for example. So after about 30 minutes of driving, my tire light illuminates to tell me the sensors aren't responding... Oh well...

Sometimes I wish they implemented the TPS like other companies, which use the ABS sensor to calculate pressure loss based on changes in average rolling diameter of each wheel. Those work no matter what wheel you have.

The "indirect" method is much more inaccurate than the "direct" method where you have actual TPS.

There's a good article here about it: http://www.tirerack.com/tires/tirete...essuremoni.jsp

Yeah, in my owners manual for my other car, it says that if the pressure is just low, it needs 5 to 100 miles to determine that the tire is low, depending on how low it is. If it is severely low, it can determine in less than 1 mile.

Not as nice as the direct method, but better than the $400 a pop that Infiniti charges for each sensor, and the the $60 the dealer charges to run the Consult-II to program/train/change the batteries on the TPS sensors.

oh, I see. shucks, I thought it was part of the valve...oh well.

My cooper-S has the flat tire monitor that runs off the ABS sensors, so
never had this issue with me changing to SSR wheels.

So, if I install 19" OEM wheels my light will illuminate because the sensors on the 19" wheels are not on the same frequency as my 2004 18" Wheel TPS? And in order for it to wok, I would have to take my sensors from my 18" wheels and install them on the 19" OEM wheels? Darn, almost too much work for just a little sensor. Tempted to just not worry about it. Thanks for the info though. And please correct me if Im wrong.

So if you run aftermarket wheels with no TPS, does the light stay on forever? Can the ECU be programmed to ignore the lack of TPS signal?

Also, is there a resource somewhere that tells which wheels the TPS will fit? I'm thinking Volk SF-Challenges for my coupe when it arrives.

No they won't work when you first install them... But you can go to the dealer, and have them use the Consult-II, to have your ECU "learn" the "new" TPS sensors. So you wouldn't have to take the ones out of your 18". I think the dealer charges like $60 for this "service" though.

The light will turn on after about 30 minutes of driving. Once it turns on, it will stay on until you turn off the car. Then when you re-start the light will be off, and the cycle continues again...

I just got used to it. As far as I know, there is no way around this, short of begging the company that makes our TPS, to make a smaller profile one, so it'll fit in my rims... As far as finding which rims will fit the TPS, you pretty much have to ask the rim shop.