The contact owns a 2018 BMW 530I. The contact stated that while driving at various speeds, a coolant-level message was displayed on the instrument panel. The vehicle was taken to a dealer where a diagnostic test determined that there was a coolant leak inside the engine. The contact was informed that the vehicle was covered under warranty and that an undisclosed part inside the coolant system was replaced. The contact stated that one week after the repair, the message returned, and the contact was informed that the upper coolant hose was defective. The contact was informed that the vehicle was no longer covered under warranty and the contact paid for the repair. After the second repair, the contact stated that the failure returned and there was coolant leaking from the vehicle. The manufacturer was notified of the failure and referred the contact back to the dealer. The vehicle was not repaired. The failure mileage was approximately 64,000.