FlyPenFly

really interested on how you got Fidelity to cover it since it’s specifically excluded in the platinum warranty language??

FlyPenFly

https://www.oemvehicleparts.com/oem-...ry-9y0915105qy

might be available for $2k if someone is willing to try

shustermeister

Service rep at the dealer did all the talking with Fidelity and after initial pushback, she explained the battery itself was not the problem but the sensor was faulty. They agreed to cover it and I am not complaining. It is amazing how a cheap little sensor is designed to be placed inside the battery so if it faults you have replace the whole thing. Sounds like too much a coincidence that after almost exactly 4 years all these sensor failures are occurring... tin foil hat on. Given the large number of incidents with this one might think PCNA would step up and give dealers the authority and compensation for covering the replacement.

George718

I had the identical situation and was able to plead my case to an assistant to the CEO of Porsche......No Dice though! She said to hold my receipt in case of a future recall as in that situation I would be reimbursed.
BTW I also had the Platinum Fidelity Warranty

George718

I spoke to exec at Porsche NA and all she could say was sorry.

George718

Thanks for the info.....Just spoke to Fidelity and explained my situation....they said I might have a case but I had to have my SA call them.....I just spoke to the Service Manager and explained everything......he's gonna research a bit and get back to me. Fingers crossed

shustermeister

good luck! If enough of these issues come up, eventually a recall may be forced. Surprised that PCNA has been rejecting these claims on 4 year old cars mostly with low mileage and most are probably garaged not exposes to elements (maybe this is not statistically true but mine is always garaged when not in use, as are most of my friends with Pcars...)
this is the second low battery issue I have had since November 2022. It is obvious to me there is a defect in the battery or charging system and eventually they wont be able to ignore it.

FlyPenFly

Cheap Chinese LiFePo4 battery banks like Ecoflow have 5 year warranties even with hard use and they’re designed for a 10 year service life…

Surprised German Porsche can’t guarantee anything close to that.

shustermeister

Exact quote from my SA to Fidelity rep: "Onboard internal battery monitoring sensor is faulty". If battery itself could not hold charge, was end of life, etc. I could see the "maintenance item" argument. When a monitoring sensor fails that triggers a fault and warning, that should be covered by a warranty or by Porsche when it appears to be a common fault in design or engineering of the component that is causing many failures in the product line. Porsche should equate to quality and performance, and they should stand behind the product. My $0.02 for what it is worth.

pinion

Not only that this one has a networked BMS which is substantially better than what a typical drop in Lithium battery has. The networked piece means it won’t over charge or generally overload the battery. In my mind the one Porsche is using is either clearly defective or the programming Porsche is using is bad and it is killing these things. Either way is an obvious manufacturer defect and something the warranty should be addressing.

George718

I think Porsche is very well aware of the situation which is why they released the software update as a quick cheap short term fix. The problem is after the 4 years is up and the issue appears again you're on your own. Shame on them.

matthewr87

Low mileage is one of the reasons for warranty denial. Manual says you have to drive at least 6k miles a year or charge it using the Porsche charger for warranty coverage to apply on the battery. If you do neither then you are probably SOL.

dasams

My LiPo battery has died again. Please see posts #246 and #252 above for background.

After getting my Cayenne back from Porsche last Wed (8/2) with the battery software update and a clean bill of health, I parked it in my garage with the CTEK maintainer attached to the posts under the hood. On Fri (8/4), we packed the Cayenne and drove two hours to Big Bear Lake for a weekend cycling event. My Cayenne sat for two days and then we drove it home on Sun without incident. Knowing the battery would be fully charged, I parked it in the garage for a couple of days and then on Tue (8/8) I attached the CTEK to the posts. The lights came on as normal so all was good.

And then yesterday, I went to the garage to start it up and the battery was dead. I was able to jump it with my MicroGravity micro-starter and I drove it around a bit. Then put it back in the garage and attached my CTEK and the lights started coming on. I called Porsche and they say to bring it back in on Mon. I have a road trip planned for Thur and I have no faith in this battery.

Question: Has anyone received a battery under warranty if they are short of the 6000 mi/yr as stated in the manual? The warranty also states that if you don't do the mileage, you are supposed to use a battery maintainer which I have been diligent about.

Edit: The 2021 owner's manual says: The battery will run down even if the vehicle is out of operation. To maintain its function, charge the battery approximately every 6 weeks or connect it to a trickle charger suitable for lithium batteries with a CC/CV or pure CV characteristic. Porsche recommends the charger and charge maintenance unit from Porsche Tequipment.

Oh please someone come up with an AGM solution 🙏

chassis

Ugh. I hope this gets resolved, an AGM solution would be great.

wageslave

AGM would be great, I would totally be okay with being able to use a non-Porsche LiFePO (ie: antigravity).