All models approved by the Epic Games Legal Department for the UE4 Marketplace are safe to use. Otherwise they wouldn’t have engaged copyright safety restrictions on sellers forcing them to change any models that resembled real world objects too much, including cars.
Indeed if it would happen that any manufacturer would sue any UE4 developer for using any UE4 Marketplace object then the question is if Epic Games lawyers would step in to solve the issue quickly for free for the developer or not.