kenv

A theory….. Porsche wrote software to manage the battery and kill the battery after four years of service. Which was to be outside of the warranty. Everyone would then have to buy a proprietary battery at a usurious price. Adding millions to the bottom line.

A software engineer screwed up and wrote the software to kill the battery system in under 4 years. Or used parameters that caused the battery system to kill the battery early. Making some batteries die in the 4 year warranty period.

They started a campaign to fix the coding “error.” But it is too late in many cases batteries are crapping out during warranty period. Probably because there is a correlation to mileage or hours. Most likely miles, That’s where the 6k miles/yr comes in. Saying they won’t warrant the car unless you drive it 6k miles a year is outrageous and suspicious.

Ok so far….The battery management software was planned to self destruct the battery after 36k miles and outside the 4 year warranty period. Rookie software guy messed up the plan to get everyone to replace their Porsche proprietary battery after 4 years. Fire in the Ukraine battery factory screws up battery production. They can’t get the batteries. Putin makes it harder. They pull the plug on the plan and use AGM batteries.

Who hasn’t had batteries that last longer than 4 years?
.
This should be called BatteryGate.

They have already proved what they can do with software and malicious intentions with diesel gate.

A special counsel is needed.

If I drive off a cliff today, notify authorities have them check to see if my brake lines were cut.

FlyPenFly

I don’t think it’s some deep conspiracy, it’s always the sensor that seems to fail in German cars…

m0mo

Dealer is working out pricing for swapping 2019 Cayenne to AGM. Any downsides to this compared to the other battery?

thinkiwanta928

Which dealer where is working on the conversion?

FlyPenFly

it would be only upside if they can do it… much doubt they can though.

Schnave

This is remarkable. My dealer said Porsche wouldn’t allow him to do this. Please keep us up to date. If able, post a parts list.

Following with interest!

chassis

Agree. Copy of dealer service invoice with parts list = definitive info.

George718

What's truly remarkable is that Porsche is getting away with this.

kenv

https://www.usa.gov/car-complaints

https://www.nhtsa.gov

It is technically a safety issue as one could get stranded.

PorscheACC

Filed one.

Will hate for my daughter, or anybody else and passengers, to get stranded here in with Texas 110+ F, or anybody stranded during a freeze, or all those people buying defective batteries that may die at any point andvthe dealer not providing warranty or heads up on this problem.

Even more, Porsche profiting from this serious defect, suspiciously not providing batterie's supplies, and not warning of unsafe and potential deadly situations on extreme weather."Your complaint regarding 2019 PORSCHE CAYENNE has been received. We appreciate you taking the time to contact us about your safety concern.

Your Complaint Number:
11540201
"

PorscheACC

May take some sometime to be posted..

m0mo

It is a combination of parts and coding / labor. I am working on the parts list.

They have not done this before. I am still thinking about being the guinea pig but have not decided yet.

beefchopper

Obviously Porsche knows exactly what parts and programming needed to be changed because they made the change and use the AGM batteries in the newer Cayennes. Whether they'd be willing to tell your dealer how to make the change or offer to sell the retrofit instead of keeping current owners with the prospect of needing to spend what works out to average about $1000 per year on battery replacements remains to be seen. I'm not holding my breath waiting for them to do either.

thinkiwanta928

My Dallas, TX area dealer, Park Place Porsche, service rep returned my call today. He said, "There is a software fix for the "Battery Low - Service Necessary" warning light." (Light came on last Saturday, voltage is 13.3 stationary and 13.5-6 when driving.)
He did call it a "recall" and no charge to update the software.
Further explaining the circuit board controller on the top of the battery is communicating with the vehicle and the error causes it to send the warning signal when the battery is actually doing well. He said they'd need the vehicle for about two hours to update the software.

Now, I did purchase a LiFePO4 battery charger and connect if under the hood. It tells me the battery is fully charged. This vehicle, in 4.5 years, has logged just under 10,000 miles. I will put the battery maintainer on the system frequently to help with the help of the battery PER the owner's manual.

FlyPenFly

I feel like hooking up a charger doesn’t really help. It’s not about the battery energy levels or chemistry… it seems it has to be a sensor failing which causes a full shutdown within its logic. But who knows?

All big lithium batteries have protective logic circuits because of the danger of fires…