The original coolant junction on certain BMW vehicles fails due to its weak plastic construction. This Dorman OE FIX hose flange kit allows direct replacement with a strengthened aluminum flange and clamp. Product Features:Upgraded replacement - this thermostat hose flange repair kit includes a stronger aluminum flange to prevent future leaksConvenient kit - comes with flange, O-ring and clamp for complete repair of failed coolant junctionApplication specific - designed to directly fit certain BMW model yearsQuality engineering - designed in the United States and backed by decades of automotive aftermarket experience