The original equipment coolant filler neck on certain Dodge Durango SUVs and Dodge Dakota trucks is made from plastic that becomes brittle over time, eventually leading to cracks in the plastic welds and fluid leaks that can damage the cooling system. This Dorman OE FIX coolant filler neck is manufactured from rugged aluminum to help withstand underhood temperature extremes, resist leaks, reduce future maintenance costs and provide increased coolant system protection.