Four Seasons 39129 A/C Expansion Valve - Rear
OE Quality 60-Day Returns
Four Seasons
 Expansion Valve

Four Seasons 39129 A/C Expansion Valve - Rear

Brand Four Seasons 39129
Position Rear
Color Brass
Refrigerant Type R134A
Type TXV
Product line Expansion Valve
Fits Toyota · 3 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 39129, Pioneer Automotive Industries 759129 and 217129 for the same application. See all 13.

$34.68Free shipping
In stock · usually ships same day before 1pm CST
Step 1 — Confirm fitment
Free return shipping if it doesn't fit when you check fitment here first.

Select your vehicle to confirm fitment
Verify this part fits before purchasing — free returns if it doesn't
Step 2 — Quantity
Order total $34.68
Free shipping to the continental U.S.
Free returns within 60 days if it doesn't fit when fitment is verified.
Not what you need? See all A/C Expansion Valve options

Four Seasons 39129 Expansion Valve for Rear A/C

The Four Seasons 39129 expansion valve is a TXV-style A/C flow restrictor built for R134A systems and finished in brass. It is a direct-fit HVAC service part for rear air conditioning on select Toyota Sienna models, helping regulate refrigerant flow through the evaporator circuit.

Key Features

  • Four Seasons Expansion Valve line for HVAC service applications
  • TXV design for controlled refrigerant metering
  • Brass construction
  • Configured for R134A refrigerant systems
  • Rear position application for select Toyota Sienna models
  • Part number 39129 for easy identification

Application Details

Fits 1998-2000 Toyota Sienna, rear, with 1 sliding door and expansion valve application. This part cross-references Pioneer Automotive Industries 759129 for the same application. The Four Seasons 39129 expansion valve is also referenced by interchange number 39129 for catalog matching and service lookup.

What It Helps Address

  • Restricted or inconsistent refrigerant flow at the rear evaporator
  • Poor rear A/C cooling performance
  • Incorrect evaporator pressure control
  • Temperature fluctuations in the rear HVAC circuit
  • Service replacement for a worn or failing TXV

Installation Notes and Tips

Verify the vehicle uses an R134A system before installation. Match the rear HVAC layout and confirm the 1998-2000 Toyota Sienna application with 1 sliding door and expansion valve configuration. Inspect the surrounding A/C components, seals, and lines during service so the replacement valve can operate within the correct system conditions.

Quality Assurance

Four Seasons supplies HVAC service parts for automotive air conditioning repair, and this expansion valve is cataloged for the specified rear application. Use the part number 39129 and the vehicle fitment details to confirm selection before ordering.

Related reading

This part fits 3 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelPositionNotes
2000ToyotaSiennaRearw/ 1 Sliding Door; Expansion Valve
1999ToyotaSiennaRearw/ 1 Sliding Door; Expansion Valve
1998ToyotaSiennaRearw/ 1 Sliding Door; Expansion Valve
Directly replaces or cross-references 13 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
Four Seasons — 39129Pioneer Automotive Industries — 759129217129807166014800001550926375912911139129191899528851508030A17129CWK759129T39129