Global Parts 3412040 A/C Expansion Valve - Rear

Rear A/C Expansion Valve for Atlas

Global Parts 3412040 is a rear A/C expansion valve for the Volkswagen Atlas. It meters refrigerant flow before the evaporator so the system can use refrigerant cooling capacity efficiently. This part is a direct-fit service component for 2018-2024 Volkswagen Atlas rear HVAC applications.

• Fits 2018-2024 Volkswagen Atlas, rear
• Controls refrigerant flow into the evaporator
• Supports proper A/C system pressure regulation
• OE-style replacement for rear HVAC service
• Part number: 3412040

How It Works

The expansion valve reduces refrigerant flow entering the evaporator, creating the pressure drop needed for heat absorption. In rear HVAC systems, accurate refrigerant metering helps maintain consistent cooling performance and stable vent temperatures. Global Parts 3412040 is built for the rear system on the Volkswagen Atlas and is listed for 2018, 2019, 2020, 2021, 2022, 2023, and 2024 models. This part cross-references UAC EX10707C for the same application.

Common Service Issues

• Rear A/C vents blowing warm air
• Uneven cooling between front and rear HVAC zones
• Restricted refrigerant flow at the evaporator
• Incorrect system pressures during A/C service
• Reduced cooling output after component wear or contamination

Installation Notes

Replace the expansion valve during A/C system service when the system has been opened or contamination is present. Recover refrigerant before service, inspect the evaporator and lines for debris, and verify seals and system charge after installation. Confirm rear-position application before ordering for your Volkswagen Atlas.

Quality Assurance

Global Parts recommends replacing the expansion valve/orifice tube each time the A/C system is serviced to help maintain proper refrigerant control and cooling performance.