The contact owns a 2016 Ram 1500. The contact stated while driving at various speeds, the vehicle stalled. There was no warning light illuminated. The contact was able to pull over to the side of the road and the vehicle was able to restart. However, the contact was unable to pull to the side of the road when the failure occurred on one occasion, and the vehicle failed to restart. The vehicle was towed to the residence. The vehicle was then towed to the dealer. The contact stated that the dealer replaced the high-pressure fuel pump (HPFP) several times. Additionally, the contact stated that the vehicle was previously repaired under NHTSA Campaign Number: 22V406000 (Fuel System, Diesel); however, the failure persisted. The contact stated that there was fuel leaking from underneath the vehicle onto the ground. The vehicle was towed to the dealer but was not diagnosed or repaired. The manufacturer was notified of the failure, but no assistance was provided. The failure mileage was approximately 89,000.