Four Seasons 39464 A/C Expansion Valve

Four Seasons 39464 Expansion Valve Overview

The Four Seasons 39464 expansion valve is a block-type A/C flow restrictor built for R134A systems. It is an aluminum replacement that meets or exceeds OEM requirements and is engineered for precise refrigerant control in select Audi applications.

For Audi A6, A6 Quattro, A7, A7 Quattro, S6, S7, and RS7 models, this Four Seasons expansion valve helps regulate refrigerant flow through the evaporator circuit for stable cabin cooling performance. The 39464 part number is a direct reference for shoppers searching for an Audi A6 expansion valve or Audi A7 Quattro A/C expansion valve replacement.

Key Features

• Four Seasons Expansion Valve, part number 39464
• Block-type design for R134A air conditioning systems
• Aluminum construction and aluminum finish
• Meets or exceeds OEM specifications
• Designed for select 2012-2018 Audi A6, A6 Quattro, A7, A7 Quattro, S6, S7, and RS7 applications
• Configured without solenoid
• Includes OE-style O-ring sealing interfaces

Product Details

This expansion valve is part of Four Seasons’ Expansion Valve line and is built for vehicles using R134A refrigerant. The block-style housing uses female suction and liquid connections with OE-style O-ring sealing surfaces, including captured and female insert O-ring styles where specified. It is listed with a 1.5 tonnage rating and a super heat setting of -2.500, supporting controlled refrigerant metering in the HVAC system.

This part cross-references UAC EX10436C for the same application.

What It Can Help Resolve

• Weak or inconsistent A/C cooling output
• Improper refrigerant metering at the evaporator
• Temperature fluctuations from a worn expansion valve
• HVAC performance issues tied to restricted refrigerant flow
• Leak concerns at aging O-ring sealing points

Installation Notes and Tips

• Verify the vehicle uses R134A refrigerant before installation.
• Confirm the suction and liquid line connection styles match the original part.
• Inspect and replace sealing surfaces as needed during A/C service.
• Recover, evacuate, and recharge the system according to proper HVAC procedures.
• Check the vehicle’s exact model year and engine configuration against the listed fitment before ordering.

Quality Assurance

Four Seasons 39464 is manufactured to meet or exceed OEM standards for the listed Audi applications. It is a direct-fit replacement for select 2012-2018 Audi A6, A6 Quattro, A7, A7 Quattro, S6, S7, and RS7 models with R134A A/C systems.

• Fits 2017-2018 Audi A6, N/A, w/ R134a; Expansion Valve
• Fits 2017-2018 Audi A6 Quattro, N/A, w/ R134a; Expansion Valve
• Fits 2017-2018 Audi A7 Quattro, N/A, w/ R134a; Expansion Valve
• Fits 2017-2018 Audi RS7, N/A, w/ R134a; Expansion Valve
• Fits 2017-2018 Audi S6, N/A, w/ R134a; Expansion Valve
• Fits 2018 Audi S7, N/A, w/ R134a; Expansion Valve
• Fits 2017 Audi A7, N/A, w/ R134a; Expansion Valve
• Fits 2013-2017 Audi S7, N/A, Expansion Valve
• Fits 2012-2016 Audi A6, N/A, Expansion Valve
• Fits 2012-2016 Audi A6 Quattro, N/A, Expansion Valve
• Fits 2016 Audi A7, N/A, Expansion Valve
• Fits 2012-2016 Audi A7 Quattro, N/A, Expansion Valve
• Fits 2014-2016 Audi RS7, N/A, Expansion Valve
• Fits 2013-2016 Audi S6, N/A, Expansion Valve