Four Seasons 39012 A/C Expansion Valve - Rear
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Four Seasons
 Expansion Valve

Four Seasons 39012 A/C Expansion Valve - Rear

Brand Four Seasons 39012
Position Rear
Color Brass
Refrigerant Type R134A
Type TXV
Product line Expansion Valve
Fits Honda and Acura · 20 vehicles

TXV design. Precisely meters refrigerant flow for efficient A/C performance.

Brass construction. Durable material helps withstand demanding HVAC conditions.

R134A compatible. Built for systems using R134A refrigerant.

Cross-references Four Seasons 39012, Global Parts Distributors LLC 3411817 and Pioneer Automotive Industries 759012 for the same application. See all 26.

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Four Seasons 39012 A/C Expansion Valve

Four Seasons 39012 is a TXV-style A/C expansion valve for R134A systems with a brass body. It regulates refrigerant flow into the evaporator to help maintain proper cooling performance in the HVAC system.

Key Features

  • Brand: Four Seasons Expansion Valve
  • Part number: 39012
  • TXV design for refrigerant metering
  • Brass construction
  • For R134A refrigerant systems
  • Rear HVAC application

Fitment

  • Fits 2009-2015 Honda Pilot, rear expansion valve.
  • Fits 2007-2013 Acura MDX, rear expansion valve.
  • Fits 1999-2004 Honda Odyssey, rear expansion valve.

Product Details

This Four Seasons expansion valve is built for rear HVAC service on select Honda and Acura vehicles, including the Honda Pilot, Acura MDX, and Honda Odyssey. As a TXV (thermostatic expansion valve), it controls refrigerant delivery based on system demand, helping the evaporator receive the correct amount of R134A refrigerant for stable cooling output. The brass construction supports use in automotive air conditioning service where accurate refrigerant metering is required. Part number 39012 is also referenced in aftermarket cross listings for the same application.

Common Issues It Can Address

  • Weak rear A/C cooling
  • Erratic evaporator refrigerant flow
  • Improper system pressure balance
  • Rear HVAC performance loss on Honda Pilot, Acura MDX, or Honda Odyssey
  • Temperature control problems caused by a restricted or worn expansion valve

Installation Notes

Verify the vehicle uses an R134A system and confirm rear HVAC placement before installation. Inspect related A/C components, seals, and lines for contamination or wear during service. Proper evacuation, recharge, and leak checking are required after replacement to restore correct system operation.

Quality Assurance

Four Seasons is a recognized aftermarket HVAC brand with coverage across a wide range of air conditioning service parts. This part is listed under Four Seasons 39012 and cross-references UAC EX10136C and EX10228C for the same application.

Related reading

This part fits 20 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelPositionNotes
2015HondaPilotRearExpansion Valve
2014HondaPilotRearExpansion Valve
2013AcuraMDXRearExpansion Valve
2013HondaPilotRearExpansion Valve
2012AcuraMDXRearExpansion Valve
2012HondaPilotRearExpansion Valve
2011AcuraMDXRearExpansion Valve
2011HondaPilotRearExpansion Valve
2010AcuraMDXRearExpansion Valve
2010HondaPilotRearExpansion Valve
2009AcuraMDXRearExpansion Valve
2009HondaPilotRearExpansion Valve
2008AcuraMDXRearExpansion Valve
2007AcuraMDXRearExpansion Valve
2004HondaOdysseyRearExpansion Valve
2003HondaOdysseyRearExpansion Valve
2002HondaOdysseyRearExpansion Valve
2001HondaOdysseyRearExpansion Valve
2000HondaOdysseyRearExpansion Valve
1999HondaOdysseyRearExpansion Valve
Directly replaces or cross-references 26 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
Four Seasons — 39012Global Parts Distributors LLC — 3411817Pioneer Automotive Industries — 759012UAC — EX10136CUAC — EX10228C80221S0XA5180221STXA0118013618023420756275960880705980715293901201480084155076831107483112141375901247505004752027111390121914471419189856A72503CWK759012