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This is the AGM battery they told me I needed if I wanted to convert 958-611-092-21
Well if you actually end up getting it done and completed, would you mind posting your service receipts with your personal info covered up? That would be amazing for the community.
Also battery part number from post #232 from @LSR on this thread:
7P0 915 105 C
12V 92Ah 520A DIN
850A EN/SAE/GS
This Varta battery is available in Europe for around $300, excluding shipping.
The MY2024 9Y0.2 base I saw at a dealer earlier this year uses a Varta 4P0 915 089 E, 12V 520A DIN 850A SAE --> importantly, this battery should be in stock at dealers in the U.S. to support 9Y0.2 parts and service needs.
@LSR would you be willing to either post your VIN, send it to me via PM or do the research on partslink24 to find your battery cable part number?
@Schnave have you posted your battery part number on this thread? Question is whether all LiFePO4 9Y0s use the same battery part number (e.g. same for base, S, GTS, Turbo and TGT).
@LSR would you be willing to either post your VIN, send it to me via PM or do the research on partslink24 to find your battery cable part number?
My car’s in the shop. I’ll be glad to look and let you know when it’s back. I note, however, that the Porsche parts sites state the above two part numbers fit the MY2022 base Cayenne (my car), as well as other trims and model years.
BTW, my SA told me earlier this week a new lithium battery is $2,100, and the cost to convert is less than the cost to replace but he didn’t recall how much less. He also said the cost to replace an AGM in a car that was delivered with an AGM is less than $500.
@Schnave have you posted your battery part number on this thread? Question is whether all LiFePO4 9Y0s use the same battery part number (e.g. same for base, S, GTS, Turbo and TGT).
My LFP battery is part #9Y0 915 105 K.
Note that the suffix letter varies by the battery’s manufacture date. Therefore, the suffix for a new battery will likely be different and is immaterial.
My GTS has been at the dealer for two weeks now waiting on a determination on whether they will warranty my dead battery. I'm not happy with the wait but at least I have not yet been denied.
Since I have a '23 base, I decided to post the Li battery part number. But I can't because my loaner has the Varta AGM battery! The negative cable goes down in the well and is routed through a port. And there's a black line with two wires that comes off of the neg post and has part number W1 37 2241366318A9. I assume this is the special part that connects to the battery controller. However, I was not able to trace it as it disappears under the foot well.
Varta AGM battery
Two wire line that is attached to the negative terminal.
Varta 7P0 915 105 for a MY23 base. So it appears MY22 and MY23 vehicles had AGMs. Were you able to see a part number label on the negative cable? This seems to be the critical item to accomplish a swap from Li to AGM.
The neg cable appears to be a generic cable and doesn't have any labels that I can see. I think the important piece is that two wire cable that is attached to the neg post and that possibly communicates with the battery management system. Can someone with a Li battery check and see if there's a similar two wire cable on the neg post?
Wow a 2021 that failed? I thought it was almost all 2019s failing.
I received my GTS in Nov, 2020 and my mileage is 13,3xx as I don't drive it every day. However, I have been diligent about connecting a Li ion battery maintainer every time that I thought it might sit for 3+ days.
I bought my 2006 Cayenne S new and it was produced in Jul, 2005. In Aug, 2016, my wife and I embarked on a year long Airstream trip and I proactively replaced the original AGM battery (it was still strong). My service advisor couldn't believe that the original AGM battery lasted 11 years. It was also a low mileage Cayenne and I kept in on a battery tender whenever I thought it would sit for 3+ days.
I received my GTS in Nov, 2020 and my mileage is 13,3xx as I don't drive it every day. However, I have been diligent about connecting a Li ion battery maintainer every time that I thought it might sit for 3+ days.
I bought my 2006 Cayenne S new and it was produced in Jul, 2005. In Aug, 2016, my wife and I embarked on a year long Airstream trip and I proactively replaced the original AGM battery (it was still strong). My service advisor couldn't believe that the original AGM battery lasted 11 years. It was also a low mileage Cayenne and I kept in on a battery tender whenever I thought it would sit for 3+ days.
My Li ion battery should be perfect.
Knock on wood..
I have been up to one month on a trip outside the states, and my parked 2019 Cayenne S was fine after returning. Though, I gave it a full charge days before I parked it.
In addition, I disabled my AS/S Start/Stop soon after I bought it. I am sure that helped too.
It seems like those vehicles that have their battery drain after just a couple of days have some kind of abnormal parasitic current leak somewhere..
Porsche is known to have alternator diode leaks, and there are easy tests for that, where when testing with a diode tester and the alternator negative connection, you find that there is on or more diodes that have voltage on both directions.
In addition, crumbling headlight wire harnesses have been found to cause almost overnight battery drainage, on some older vehicles. I was surprised to see the wires in the harness just crumble after wigling the harness.
It seems like the wire insulating materials didn't hold the years of hot/cold exposure.
08-26-2023, 01:53 AM
