Four Seasons 39588 A/C Expansion Valve
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Four Seasons
 Expansion Valve

Four Seasons 39588 A/C Expansion Valve

Brand Four Seasons 39588
Color Aluminum
Description Expansion Valves
Liquid Inlet Fitting Gender Female
Liquid Inlet Fitting Thread Diameter No. 6
Liquid Inlet Size IN 0.540
Liquid Inlet Size MM 13.8
Liquid Inlet Style Female Insert O-Ring
Liquid Inlet Thread Type Not Threaded
Liquid Inlet Type Insert O-Ring
Liquid Outlet Fitting Gender Female
Liquid Outlet Fitting Thread Diameter No. 10
Liquid Outlet Style Female Insert O-Ring
Liquid Outlet Thread Type Not Threaded
Liquid Outlet Type Insert O-Ring
Lqd Out Size IN 0.6
Lqd Out Size MM 15.3
Material Aluminum
Meets / Exceeds OEM? Yes
Mounting Hole Quantity 2
O-Ring A Number/Desc [24608] / Green O-Ring
O-Ring B Number/Desc [24628] / Green O-Ring
O-Ring C Number/Desc [24642] / Green O-Ring
Refrigerant Type R134A
Style w/o Solenoid
Suc In Size IN 0.710
Suc In Size MM 18.000
Suc Out Size IN 0.710
Suc Out Size MM 18.000
Suction Inlet Fitting Gender Female
Suction Inlet Fitting Thread Diameter No. 12
Suction Inlet Style Female Insert O-Ring
Suction Inlet Thread Type Not Threaded
Suction Inlet Type Insert O-Ring
Suction Outlet Fitting Gender Female
Suction Outlet Fitting Thread Diameter No. 12
Suction Outlet Style Female Insert O-Ring
Suction Outlet Thread Type Not Threaded
Suction Outlet Type Insert O-Ring
Super Heat -5.000
Switch Included? Not Included
Tonnage 2.0
Type Block Type
Product line Expansion Valve
Fits BMW · 7 vehicles

OE direct replacement. Meets or exceeds OEM requirements for dependable fit and function.

Aluminum construction. Lightweight material resists corrosion in demanding A/C service.

Block type design. Built as an A/C expansion valve for precise refrigerant flow control.

Cross-references Four Seasons 39588, UAC EX10656C and 217605 for the same application. See all 6.

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Four Seasons 39588 Expansion Valve

Four Seasons 39588 is a block-type A/C expansion valve for R134A systems, built with an aluminum body and female insert O-ring connections for the liquid and suction lines. It is an OE-style HVAC flow restrictor for BMW X3 and BMW X4 applications, including 2016-2018 models listed below.

Key Features

  • Brand Line: Expansion Valve
  • Part Number: 39588
  • Block type A/C expansion valve for R134A refrigerant
  • Aluminum construction with aluminum finish
  • Female insert O-ring liquid and suction fittings
  • 2 mounting holes
  • Style: w/o solenoid
  • Meets or exceeds OEM requirements
  • Super heat setting: -5.000
  • Fits 2.0 ton applications

Product Details

The Four Seasons Expansion Valve line focuses on precise refrigerant metering for automotive air conditioning systems. This Four Seasons 39588 expansion valve regulates refrigerant flow through the evaporator circuit, helping maintain proper system balance in BMW X3 and BMW X4 HVAC setups. It uses No. 12 suction inlet and outlet thread diameters and No. 6 liquid inlet with No. 10 liquid outlet thread diameters, with insert O-ring sealing surfaces for the liquid and suction connections.

This part cross-references UAC EX10656C for the same application.

Vehicle Fitment

  • Fits 2017-2018 BMW X4, N/A, Expansion Valve.
  • Fits 2017 BMW X3, N/A, Expansion Valve.
  • Fits 2016 BMW X3, N/A, From 4/16; Expansion Valve.
  • Fits 2016 BMW X4, N/A, From 4/16; Expansion Valve.

What It Helps Address

  • Weak or inconsistent cabin cooling
  • Incorrect refrigerant metering at the evaporator
  • Pressure imbalance in the A/C circuit
  • Expansion valve replacement during HVAC service
  • Leak concerns at worn O-ring sealing points

Installation Notes

Verify the vehicle build date before ordering for 2016 BMW X3 and 2016 BMW X4 applications, since fitment begins from 4/16. Confirm R134A system compatibility, match the liquid and suction line connection sizes, and inspect the O-ring sealing surfaces before installation. Proper evacuation and recharge procedures should be followed after service.

Quality Assurance

Four Seasons lists this expansion valve as meeting or exceeding OEM requirements for the specified applications. The aluminum construction and OE-style connection design support accurate fitment in the listed BMW X3 and BMW X4 models.

Related reading

This part fits 7 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelLitersCylindersPositionNotes
2018BMWX4——N/AExpansion Valve
2017BMWX3——N/AExpansion Valve
2017BMWX43.0LL6N/AExpansion Valve
2017BMWX42.0LL4N/AExpansion Valve
2016BMWX3——N/AFrom 4/16; Expansion Valve
2016BMWX43.0LL6N/AFrom 4/16; Expansion Valve
2016BMWX42.0LL4N/AFrom 4/16; Expansion Valve
Directly replaces or cross-references 6 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
Four Seasons — 39588UAC — EX10656C21760575979864116823978A17606