mlrtime3

Hi Guys, have a questions for the forum. I recently purchased a 2021 C2S CPO with 12k miles on them. I just had OEM wheels replaced with another set of OEM wheels on the same tires. The professional (Ex Porsche mechanic) who installed them said the rears are new and great condition but the fronts are original Parelli DOM 2021 with 4mm and very light signs of dry rot, probably 2k miles left on them.

I've put 409 local non track miles on the car since delivery, I should have checked tires before putting any miles on it but just trusted the CPO process. The dealership is out of state so I cannot drive by and ask. The CPO report shows 6mm left so I find it highly unlikely that I took off 4mm of tread with 400 miles. I know this heavily depends on driving style, but I can provide trip details with distance, avg speed, etc.

Rear tires were replaced during CPO process, not fronts. So my thoughts are that these tires are right on the line as what is acceptable to pass as a CPO car, considering what we pay for CPO certification they should have replaced these wheels... Have any of you gone through the dealer or PCNA to request new tires?

Thanks!

Ikone

Your math doesn't add up. If CPO says 6mm and they are now 4mm, then you drove 2mm off.

mlrtime3

Or they didn't measure correctly during CPO? My driving is quite conservative, I doubt I wore out 2mm in 409 miles. It's possible but very unlikely.

RG88

I suppose you could try to ask for the extra 2 mm in compensation.

mlrtime3

Funny, but that's not how it works. The tire has to meet certain requirements to pass CPO. I suppose I disagree on their assessment. I'm just asking if anyone here has been in the same situation and received positive results. I'm not looking for some extra payday, just want to know what expectations with this situation.

Ikone

I would talk to them at least about the tire being dry-rotted. I think that's a safety issue. Maybe they'll discount some new ones?!

PHX

I just went through this with our 2020 CPO'ed Cayenne Turbo.

I, stupidly, did not check the tire tread depth on my own as I had purchased CPO'ed BMWs before and always always always had brand new tires, so, have I mentioned stupidly, did not check.

2000 miles later chunks are falling out of the tires (went from 24,000 miles to 25,994 miles in 6 months in SW FL) and I took it in for a looksee at the purchasing dealer and they said 4mm was the minimum in order to replace them under the CPO process. I did have pictures on the CPO report of 6mm on each tire. The pictures aren't exactly proof of my vehicle's tire, it could be any tire.

I bit the bullet, walked out of there, and bought tires from Costco and just won't go back there, for anything at all. It was a janky crappy experience, however I owned my part for not checking and assuming, so went and purchased the tires.

The good news is, you can go buy tires and whatever brand you wish.

I have to questions the dry rot at only 3 or 4 years old though...that's a bit much. Even living in AZ where that is a thing, 4 years is not even "dry rot" type material unless the tires are stored outside in the sun the entire time.

981KMAN

Take another measurement using the Center Tread Groove. Looks like you will see 5 to 6mm there, which is where they probably measured them. The Outer grooves always wear first on front tires.

CubsFan1

This should help answer your question(s). This is a screenshot taken directly from my CPO paperwork received by the dealer which had to be signed off by me at the time of purchase.

jlegelis

Unless you really love the dealer I'd just buy a set of fronts and be done with it rather than go through the exasperation of trying to negotiate a settlement and getting torqued up over short money. FWIW my experience the '111 point' checklist isn't worth the paper it's written on... my CPO car had a cracked lens, damaged spoiler, and marred leather which I was able to notice before taking delivery, but otherwise it would have gone out the door. For me, the less time I spend with my janky dealer the happier I am... (unfortunately a common sentiment these days).

mattchow

just do yourself a favor and buy some new PS4S.

mlrtime3

Appreciate the responses and just helpful to know others have had a similar experience. Rennlist acts just as much as a therapy group for "obsessed" Porsche owners as it does a technical forum.

I was planning on replacing them with PS4S, I'm just now in a situation where the front two tires are close to dead and the rear two are new and none are PS4S.

For anyone else reading, make sure to check tires before signing CPO forms. I had to sign the docs blind as this was a out of state delivery.

992gts

I will need new summer tires coming up and I am a bit confused on the NA0 vs N0. I have read the A in NA0 means it is for the 911, what is the N0 for? Why would someone ever get the N0?

981KMAN

N = Porsche rated
A = Rated for 911 Vehicles
0 = 1st revision of tire Approval

So if a the tire is modified and resubmits for approval, it becomes NA1

992gts

so N0 is Porsche approved just not 911 specific? Why would someone buy that over NA0