The contact owns a 2019 BMW X5. The contact stated while the vehicle was parked, the vehicle failed to start as intended. No warning light was illuminated. The vehicle was towed to the dealer where it was diagnosed with a failed alternator. The contact was informed that the alternator needed to be replaced. The vehicle was not repaired. The contact referenced an unknown recall repair; however, the VIN was not included. The manufacturer was not made aware of the failure. The failure mileage was approximately 49,302.