(USED) 2016 Isuzu NPR - COOLANT RESERVOIR - Side: Passenger Side. Color: White. Material: Plastic. Engine: Isuzu 4HK1-TC. For more information about this item, give us a call. We ship Worldwide!. (CRG HEAVY TRUCK PARTS) 929 W PULASKI HWY. ELKTON, MD 21921.