11531743329 Cooling Hose Flange Thermostat Cover Water for 3 Series 318i E36 E46 This cooling hose flange serves as a thermostat cover and is designed for use in the water cooling system.It connects to the cooling hose and helps maintain proper coolant flow within the engine.The part is identified by the OE number 11531743329 and is compatible with specific vehicle models.It is intended to replace the existing thermostat housing cover where applicable.The package includes one hose flange assembly.compatibility with your vehicle by verifying the and comparing it with your current component.