2018 PORSCHE PANAMERA Power Train Problems

The main water pump on my 2018 Porsche Panamera 4S failed prematurely. This is not a simple external coolant leak; the internal seal failed, allowing pressurized engine coolant to migrate into the vehicle's vacuum system. The coolant traveled through the vacuum lines and contaminated the vacuum solenoids and change-over valves. This failure mode presents a significant safety hazard because the vacuum system controls critical engine components, including turbocharger wastegates and exhaust flaps. Contamination of these components can lead to sudden loss of power, "limp mode" activation while driving at highway speeds, or unexpected engine behavior, increasing the risk of a crash. Cross-Reference to Known Defects: This vehicle utilizes the EA839 V6 engine platform, which is shared with Volkswagen and Audi vehicles (specifically the Audi S4, S5, SQ5, and Q7). Audi and Volkswagen have already acknowledged this specific manufacturing defect in the class action settlement Fiscina v. Volkswagen Group of America,...

On my 4th visit to the Porsche dealership and the problem is still not resolved. There are MANY references to the same problem online. The problem: error message on the dash stating REVERSE NOT AVAILABLE and car goes into 3RD gear only and stays there. Only final solution is new transmission which Porsche resists doing It has happened 6 times now. attaching a photo and I have many more of these from 2024

Transmission fault causes car to be stuck in gear and will not shift. This issue appears to be happening quite frequently with these ecars, regardless of mileage. It's dangerous, especially if it occurs on the highway .

The auto in question was, and is, under the new car warranty - While driving forward, one of the automobile's display screens displayed an error message stating "Transmission error - Reverse gear not available"; this in itself is not a major issue as the car was in a forward gear. The major safety issue is that the car would not shift gears once this error message cam up. The error has occurred multiple times and, thankfully, did not happen at a critical time - i.e. merging onto a highway. The first time this happened was on August 6, 2020. Porsche was notified of the issue and I was told there was no fix at the time. It happened multiple other times and every time the dealer told me that there wasn't a fix. Porsche did apply a "temporary" fix in the November/December, 2020 timeframe, but this was not permanent and...