Engine Air Intake Heater Relay. To confirm that this part fits your vehicle, enter your vehicle's Year, Make, Model, Trim and Engine in theCompatibility Table. This part generally fits Dodge vehicles and includes models such as Ram 2500,Ram 3500 with the trims of Laramie Cab & Chassis 2-Door,Laramie Cab & Chassis 4-Door,Laramie Crew Cab Pickup 4-Door,Laramie Standard Cab Pickup 2-Door,SLT Cab & Chassis 2- Door,SLT Cab & Chassis 4-Door,SLT Crew Cab Pickup 4-Door,SLT Standard Cab Pickup 2-Door,ST Cab & Chassis 2-Door,ST Cab &am p; Chassis 4-Door,ST Crew Cab Pickup 4-Door,ST Standard Cab Pickup 2-Door.