The contact owns a 2021 Lincoln Corsair. The contact stated while the vehicle was parked, the contact discovered that the trunk compartment was flooded with water. No warning light was illuminated. The vehicle was taken to be inspected; however, the cause of the failure was not yet determined. The vehicle was taken back to the dealer on several occasions however, the cause of the failure could not be determined. The vehicle was not repaired. The manufacturer was not notified of the failure. The failure mileage was unknown.