The contact owns a 2021 Ford F-150. The contact stated that while the vehicle was parked, the tailgate opened unexpectedly. There were no warning lights illuminated. The contact stated that the tailgate unintendedly opened and closed independently. The vehicle was taken to a dealer and was diagnosed with a fault in the tailgate switch. The vehicle was not repaired. The dealer was made aware of the failure. The manufacturer was made aware of the failure. The failure mileage was approximately 72,000.