2021 Porsche Cayenne Electrical system Problems

“Odometer Fraud. The contact purchased a 2021 Porsche Cayenne. It was discovered that there was a mileage discrepancy. The vehicle was a dealer sale. At the time of purchase on 5/29/25, the mileage was 21,000. The contact had taken the vehicle to another dealer for other repairs, and the dealer informed the contact that the vehicle was flagged for Odometer Fraud, and the actual mileage was 90,000. The dealer found an odometer tampering device still located on the vehicle, but deactivated the device. The contact called the State Attorney General's Office for New Jersey.”

“I was driving the auto and parked in my garage without any indication of a fault. I attempted to start the car about 30 minutes later and the car would not start and gave an error message that said change driver I tried both keys and neither would allow the car to be started. There was no starter noise indicating a weak battery. I had to have the car towed to the dealer after the tow company found a way to unlock the drive shaft with a key that is part of the car service tools. I could not move the car if I had stopped on a roadside. The dealer had never seen this issue before. …”

“Battery completely discharged and the safety switch in the battery malfunctions and battery can not be charged again. There are many complaints seen online about the battery problems Porsche has. This strands the car and me the driver. The dealer and independent mechanics said the same. There were no warning lamps or messages prior to the failure.”

“Instrument cluster anti-glare film or delamination on center and left instrument cluster. The film is wearing away in certain irregular sport and shapes. The overall wear is impacting the visibility to the center cluster under certain conditions leading to obscure visibility to important information, including vehicle speed or other warning light. It has been raised to the dealer, then to Porsche NA, but the dealer has stated they (Porsche NA) will not cover the repair, even though the vehicle is under a CPO warranty. This first started appearing this year and has gotten worse over time. …”

“Much like thousands of Cayenne drivers, I am constantly let down by an ongoing issue with Adaptive Cruise Control failures with an error message that reads, “Adaptive Cruise Control unavailable.” THIS MAY CAUSE SERIOUS INJURY OR DEATH IF NOT REPAIRED AS VEHICULAR COLLISION RATES INCREASE DRAMATICALLY TO NO AVAIL. Porsche dealers are notoriously recalcitrant about taking adequate responsibility for these failures. The cost of repairing Porsche’s poor craftsmanship is either prohibitive or they are disinterested in repairing these problems within an acceptable timeframe. …”