2018-21. A cover that prevents foreign debris from entering the container. Engine Cooling. Inverter Cooling. Location-Filler Neck. Location-Reservoir. Radiator Cap. To 05/03/2019. To 07/08/2019. To 07/15/2019. Assembly -. Engine Coolant Reservoir. Expansion tank. Filler. Included with: Reservoir Assembly, Reservoir tank.