Hi, been lurking here for quite some time but having hit a pothole at speed, I now have to replace a tire or two and have some questions about TPMS.

My front passenger side tire developed a nasty buldge after hitting a pothole. Given that I have 12K kms on my Cayenne Turbo, I suspect it would be safer to replace both front tires so that the tires on the same axle have the same tread depth. I was also planning to put the new tires in the rear and move the rear tires up front.

Will the TPMS automatically recognize that the wheels have been switched around or is there some ritual that has to be performed for the car to recognize that the wheels have been shifted around? The iPhone/iPad manual doesn't seem to say anything about this but from what I've gathered doing a quick search on this website, it seems this should be automatic. Is this correct?

Thank you.

 

TPMS sensors are little more that wireless pressure gauges. They don't care if they're installed right or left, front, rear, or spare. One must take on faith that the TPMS module can differentiate between/among them to display which location originated the pressure data. Its probably a logig algorithm: delay time = distance. Anything short of that would discourage tire rotation

//greg//

 

it doesnt matter where they go, they will relearn/calibrate on their own web you drive. porsches seem to take longer than makes for the relearning process but just make sure your psi is correct and it will self correct after a bit of driving

 

I would probably only replace the one, happened to me too. Not sure what you are running but the Michelins aren't cheap! Check your rim thoroughly for any damage. TPMS should be fine if swapped left, right, front or back.

Cheers,

 

This is horrible advice. Yes tires can be expensive, but your AWD system is more expensive. Running mismatched (tread pattern and/or wear) will damage the transfer case if done for too long.

Technically you should always be replacing all four, but as long as there is still significant tread left on the other axle the general consensus is its ok to just replace one axle.

Regardless of if you are replacing two or four, all four must be the same model and tread pattern.

 

Thanks for the replies. I checked with the dealership and they said I can just replace the tires on the front axle pair. But they wanted more than $1k per tire! The Michelin Latitudes in 21" is not a popular size here but luckily they were available from the local Michelin reps so I'm getting it from them instead at half the price. Still more expensive than getting it in th US (I'm I the Philippines) but that's about what it will cost me if I have the tires air shipped to me. I just wanted to make sure there aren't any gotchas with the TPMS.

Thanks guys!

 

If I was getting two new tires, they would go on the fronts for maximum steering traction and neutral handling. With your low mileage, a tire gauge might not show much tire wear but if I was getting one new tire, I would do a full rotation with the new tire ending up in the rear.