I recently bought a 997 C4 and traded in the stock wheels for these 19" HRE 540R models. The problem is that it doesn't have the pressure monitor built into it so I have the lights on the car. Any idea how to turn that off?! Pls advice.

As a matter of fact, I don't mind changing it out for stock wheels again. It must have tires and TPMS built into it. Care to trade??!!!
It has to come from the Wide Body model. No lobster forks pls.

These HRE were actually built for the C2 or C2S. Notice the rear 15mm spacers on my car now. Fits flush on C4 and C4S w/ spacers, as well as C2/ C2S without spaces.

 

Can you just add the sensors to the wheels?

 

yeah, i just ordered some techart wheels and needed new tires. The guy at my shop informed me i would need new sensors for the new wheels and he put an order in for me. Its possible to do.

 

You either get the right sensors OR you go to the dealer to turn off the TMPS system.
Its a pain in the ***. When I had my 997 GT3 alot of the GT3 guys just went and turned them off. In my new 997.2 the TPMS showed -4 lbs in the pass front. I put maybe 10lbs in and it showed -2 lbs. Its just not that good.

 

I watch my TPMS readouts occasionally and always notice strange differences as well. I have a few theories though..

I think the problem arises because you have individual sensors in each wheel that are measuring internal pressure (so against a recorded constant) as opposed to the normal tire filling that's measuring against the surrounding outside air.

I think the variability between tire readings while driving is because each sensor is slightly different in it's sensitivity so you can get 1 sensor reacting differently from another one (where in external measuring you are checking all 4 tires with the same gauge). That and I suppose cornering, accelerating and braking may heat the tires unevenly.

 

Someone correct me if I'm wrong, but I believe you need TPMS compatible wheels; you can't just add OEM sensors to an incompatible wheel.

 

from my understanding there are different sensors for each type of wheel.

 

This topic suddently became complicated. I don't know if buying oem sensors will be compatible w/ these HRE wheels. My favorite decision is to learn how to turn off the lights manually. GOing to the dealer will be alot of hassles, not to mention at least $200 bucks just for them to look at the car.

 

When I was shopping for new wheels and tires, I ultimately decided it was far too chancey to buy bits and pieces off ebay and cobble something inexpensive together myself. So, instead I bit the bullet and bought a complete package from Tire Rack, which was guaranteed as to fitment and compatibility. Your situation reaffirms that I made the right decision.

 

My wheels were already packaged when I bought it. Yea, you should always buy from 1 complete stop shop. Dont fuss around with experiments, cause you'd end up w/ alot more time wasted and frustration.