So on Friday I got a TPSM alert with bizarre pressure numbers that didn't make sense including a negative LR number (see pic). At the time, the LR tire in question was a little low on air (checking with a tire pressure gauge) and I was planning to top it off when I got home until i sorted it out. Tire was flat by then, not sure if it was a puncture or from a pothole. Checked another TPMS screen on the dash and that info was correct (see pic). Has anyone else seen this?

The tires have a little over 3000 miles on them with a fair amount of aggressive driving. My understanding is they should be replaced in pairs which is what I strongly prefer. My SA told me it depends on the tread depth differential. Any thoughts on this?

Car was flat bedded to dealer. I won't know more about what's going until tomorrow when they look it over. I will also ask about the first error message. The don't have my Goodyear F1 Assymmetric 3 tires in stock but will get them in quickly.

Fortunately I did get the tire and wheel insurance for 84 months! I have never bought this insurance before but given the crappy roads in NJ and low profile tires, I felt it was a must.

 

The reason it is reading negative is because that is the amount it is below the target psi. Your front tires are +5 psi, your rear passenger is +8 psi, and you rear driver is -37 psi from the target psi, which itself varies depending on what mode you have it in (comfort/full load).

 

That's a lot of PSI. The roads here are even worse and I'm usually at 29/32 (also Goodyear). Also, you're probably ~1/3 of the way through your tread life. I'd replace both rears.

 

what dfid the insurance cost you? my dealer wanted $4400 for 5 years. I declined.

 

I was told to go with the door plaque PSI recommendations.

Agree on the tread life. I'm going to push to have both tires replaced. Worst case I'm sure something could "inadvertently happen" to the RR tire requiring replacement.

 

each of your displays is showing (correctly) a different thing. The right one is showing deviation from target (hence the negative), the left one is showing absolute pressure (hence all positive with one super low reading)

 

I paid about $5000 for 84 months. Of course price had gone up from 2024 when I ordered the car and picked it up in March 2025.

Each rear tire is about $500 + installation and the wheels are well over $3000

 

Don't be surprised to be asked to pay for the undamaged tire as the insurance will likely only cover the damaged tire - the opposite side would be considered "normal wear" and not covered by the insurance. Had to pay on our Macan with one damaged tire and to match tire depth had to purchase the opposite side.

 

My SA told me they would replace both tires IF the tread depth differential between the new LR and existing RR was too great. I don't recall the exact criteria he mentioned. New tire depth on these tires is 8/32

I'm a very good customer so they try to take care of me when possible. I have a 2026 Cayenne GTS due in this month. How many people buy 2 new Porsches in under a year? The Cayenne was an unplanned purchase but I need to sell my 2021 BMW X5 M50 before something (not if but when) major fails on it again and very low mileage. I'm not one to throw good money after bad.