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Unknown Or Other
03/10/2025
The A/C in this 5 year old vehicle no longer works. There are no warning lights or anything to suggest the A/C is no longer functioning, other than turning it on to see if it works. The weather would need to be warm enough to test it. The dealer said it is due to the Evaporator core, and to replace it would cost $8,000.00. Upon search, many others have had this same malfunction. Audi uses the same part in their vehicles and in 2021, they revised their new car warranty to include the A/C evaporator for 10 years/100k miles. Porsche should also commit to this action as they are using the exact same faulty part and these vehicles cost even more than the Audi’s.
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Power Train, engine
08/19/2024
When car downshifts from 2nd gear to 1st gear, it lunges / jerks forward, even as brakes are applied. Porsche mechanic and Porsche Cars North America both indicate nothing is wrong with the transmission. THIS IS A CONSTANT ISSUE. EVERYDAY FOR THE LAST TWO WEEKS. EVERY STOP.
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Electrical System
11/01/2022
2019 Porsche Cayennes (and other Porsche models) have LiFe P04 lithium batteries that have an internal Battery Control Module that causes a "Battery Low " indication. Porsche has been updating the software/ firmware for this module, only for it to fail again. Eventually, the battery will fail, lose charge, and become dead. There are no after market batteries available and if you are 1 mile out of the warranty period, Porsche forces you to buy a new replacement battery from them for over $2,000.00 USD plus labor. This battery failure condition for vehicles with this type of battery is well known by Porsche and they now use a completely different type of battery in their newer models. This failure should be considered a Safety issue and concern since the battery powers every safety feature the vehicle has to offer. There are pages upon pages of testimonies on the Rennlist forum website for Porsche owners and all have been advised to contact Porsche Cars North America and only a small pe...
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Electrical System
08/22/2023
Porsches with LiFePO4 Lithium batteries (like mine 2019 Cayenne S) have a software/hardware error that causes the battery to incorrectly send a code to the battery management system so that it will suddenly shutdown the battery permanently and will require a full battery replacement, which the dealers abuse its customers by charging $3,000 to $5,000 dollars and give a battery replacement date as almost one year later. Porsche has internal TSBs but it is not recalling all the customers to have the software update for the controller/sensor bug/defect so that the battery management system will not overcharge the Lithium battery and damage it or cause the battery to issue a software code that preventsbthe battery from waking up or be usable. Texas has temperatures of 110 F, and becoming stranded because the battery gets incorrectly/permanently shutdown is a death sentence to Porsche customers. Porsche is being arrogant with their customers and deeply profiting from this know defect. T...
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Electrical System
07/10/2023
In September 2022 the yellow battery warning light appeared on my dash while my car was still under warranty. Porsche had an open Campaign WMJ9 that involved a software update that resolved the issue. Last month, June, while my car was now out of warranty the same yellow warning light appeared but this time the dealership recommended i replace the battery at a cost of $3,200 Porsche refuses to accept that these 2 instances are related and that the battery should be covered since the software update during my first service visit didn't offer a long term solution. to make matters worse the lithium battery used in my vehicle has been an issue for porsche to say the least.
