2021 Porsche Cayenne GTS problems

“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. It is long past due for the Federal government to intervene and compel Porsche to recall and repair their Adaptive Cruise Control failures. I had my cameras recalibrated three (3) times in three (3) weeks and yet the problem persists without meaningful redress. HELP!”

“Dashboard leather is separating and was told this could affect the airbag deployment in the case of an accident. Porsche dealership is asking 10k outside of warranty to replace the dash. If it was just cosmetic I could deal with it, but now that it is a safety concern for my passenger I feel forced to overspend. Even a reduced amount would help but a whole dash replacement sounds excessive to make sure the leather is not obstructing the airbag.”

“Problem with the hybrid system and the engine control system. Unit changed automatically and unexpectedly from battery power mode to engine power mode when on battery power mode only. This change is not supposed to happen. This failure happened when starting the unit, put on drive and starting to move forward. This failure caused the unit to charge forward with more power unexpectedly. Causing almost to collide. At the time of the failure “engine control system” warning and “e power not available” warning lid up. The unit has been for service for 10 times with the same warnings powering up. At this time the unit has been on service for almost four month.”

“While coming to a stop the vehicle lurches around 1200 rpms as the rpms are falling. The vehicle appears to already be in 1st gear when this happens. This can be replicated in all driving modes. observation: when braking or even when coasting to a stop the vehicle will slow down rapidly, as if the brakes are being tapped hard (the brake pressure is constant and occurs even when not braking) for a brief second and then release causing a lurching motion. This lurching motion is enough to concern while driving as a possible loss of traction. it feels as if the car is engine braking. This issue puts the driver, passengers, and other vehicles at a safety risk. I have had passengers state that it gives them motion sickness. I have reported this to the dealer and they had the car twice. The second time was for a substantial amount of time. The dealer is on record stating that they can recreate it, observe it, but have not been able to fix it. they have reset the software on several systems including the transmission. there are no third party devices on the car, the car is stock, there are no warning lights.This has been the case since day one of having the car (brand new).”

“when decelerating and car is in gear 2 it lurches the car forward while braking, basically fighting the attempt to slow the car down. I attribute this to aggressive downshifting, but is a safety issue because the operator then needs to compensate by pressing down on the brake pedal harder to stop the car. This has happened inconsistently when driving, but occurs more frequently than not.”