Airtex Automotive Division 911-573-939-03 A/C Receiver Drier

The Airtex Automotive Division 911-573-939-03 is an air conditioning receiver drier designed as a direct replacement component for select Porsche applications. This critical A/C system component is located on the high-pressure side between the condenser outlet and expansion valve inlet, where it performs multiple essential functions to protect and optimize air conditioning performance.

Key Functions:

• Filters refrigerant to remove debris, metal particles, and contaminants that could damage the compressor or clog system components
• Removes moisture from refrigerant using an internal desiccant material, preventing internal corrosion and compressor oil degradation
• Stores liquid refrigerant and ensures only liquid (not vapor) reaches the expansion valve for optimal cooling efficiency
• Acts as a separator by allowing heavier liquid refrigerant to settle at the bottom while vapor rises to the top

Construction and Features:

• Sealed cylindrical metal canister design for durability
• Features inverted (flare) fittings on both inlet and outlet connections
• Internal pickup tube extends to the bottom to draw liquid refrigerant
• Contains desiccant material to absorb system moisture
• Integrated filter screens trap circulating debris

OEM Cross-Reference: Replaces Porsche part numbers 911-573-939-03, 911.573.939.03, 91157393903

Important Service Note: The receiver drier should be replaced whenever the A/C system is opened for service, when the compressor is replaced, or if the system has been exposed to moisture. Once exposed to atmosphere, the desiccant absorbs moisture from the air and must be replaced to maintain proper A/C system protection.