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Four Seasons 39303 A/C Expansion Valve - Rear
| Brand | Four Seasons 39303 |
|---|---|
| Position | Rear |
| Color | Aluminum |
| Description | Expansion Valves |
| Liquid Inlet Fitting Gender | Female |
| Liquid Inlet Fitting Thread Diameter | No. 6 |
| Liquid Inlet Size IN | 0.4 |
| Liquid Inlet Size MM | 10.15 |
| Liquid Inlet Style | Captured 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. 8 |
| Liquid Outlet Style | Captured O-Ring |
| Liquid Outlet Thread Type | Not Threaded |
| Liquid Outlet Type | Insert O-Ring |
| Lqd Out Size IN | 0.61 |
| Lqd Out Size MM | 15.5 |
| Material | Aluminum |
| Meets / Exceeds OEM? | Yes |
| Mounting Hole Quantity | 2 |
| O-Ring A Number/Desc | [24606] / Green O-Ring |
| O-Ring B Number/Desc | [24670] / Green O-Ring |
| O-Ring C Number/Desc | [24672] / Green O-Ring |
| Refrigerant Type | R134A |
| Style | w/o Solenoid |
| Suc In Size IN | 0.72 |
| Suc In Size MM | 18.3 |
| Suc Out Size IN | 0.72 |
| Suc Out Size MM | 18.3 |
| Suction Inlet Fitting Gender | Female |
| Suction Inlet Fitting Thread Diameter | No. 12 |
| Suction Inlet Style | Captured 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 | Captured O-Ring |
| Suction Outlet Thread Type | Not Threaded |
| Suction Outlet Type | Insert O-Ring |
| Super Heat | 8.000 |
| Switch Included? | Not Included |
| Tonnage | 1.000 |
| Type | Block Type |
| Product line | Expansion Valve |
| Fits | Mazda · 9 vehicles |
OE direct replacement. Meets or exceeds OEM requirements for a precise fit.
Block type design. Aluminum construction with captured O-ring connections.
R134A compatible. Built for modern refrigerant systems without a solenoid.
Cross-references Four Seasons 39303, Global Parts Distributors LLC 3411839 and UAC EX10275C for the same application. See all 11.
Four Seasons 39303 Expansion Valve for Rear A/C Service
Four Seasons 39303 is a block-type A/C expansion valve for R134A systems. It is built from aluminum and matches the OE-style layout used in rear HVAC service on select Mazda CX-9 models.
For rear air conditioning repair on a 2007-2015 Mazda CX-9, this expansion valve helps regulate refrigerant flow through the evaporator circuit. The Four Seasons Expansion Valve line is focused on direct-fit HVAC flow control components, and part number 39303 follows that approach with captured O-ring connections and OE-matching mounting points.
Key Features
- Brand: Four Seasons Expansion Valve
- Part number: 39303
- Block-type A/C expansion valve
- Aluminum construction
- R134A refrigerant type
- Rear HVAC application
- Female suction and liquid fittings
- Captured O-ring, insert O-ring connection style
- Meets or exceeds OEM requirements
- Super heat rating: 8.000
- Mounting hole quantity: 2
Detailed Description
Four Seasons 39303 is an A/C expansion valve designed for rear system service on the Mazda CX-9. It uses a block-type design with female suction and liquid ports, No. 12 suction inlet and outlet thread diameter, and No. 6 liquid inlet with No. 8 liquid outlet sizing. The aluminum body and captured O-ring interfaces support a clean OE-style replacement for R134A-equipped HVAC systems.
This part cross-references UAC EX10275C for the same application. If you are replacing a rear expansion valve on a 2007-2015 Mazda CX-9, part number 39303 is the direct-fit service part to verify against the original component.
What It Is Used For
- Restoring refrigerant metering at the rear evaporator
- Correcting weak or uneven rear cabin cooling
- Addressing A/C performance loss caused by a restricted valve
- Replacing a leaking or damaged rear expansion valve
- Servicing R134A rear HVAC systems on Mazda CX-9 models
Installation Notes and Tips
Fits 2007-2015 Mazda CX-9, rear. Confirm the original valve style, port sizes, and refrigerant type before installation. Replace the O-rings with the correct green O-ring seals specified for the connection points, and inspect the surrounding A/C lines and evaporator fittings for wear, corrosion, or contamination before reassembly.
Quality Assurance
Four Seasons lists this expansion valve as meeting or exceeding OEM requirements. The part is built for direct replacement service in the Four Seasons Expansion Valve line and is specified for R134A rear HVAC applications.
| Year | Make | Model | Position | Notes |
|---|---|---|---|---|
| 2015 | Mazda | CX-9 | Rear | Expansion Valve |
| 2014 | Mazda | CX-9 | Rear | Expansion Valve |
| 2013 | Mazda | CX-9 | Rear | Expansion Valve |
| 2012 | Mazda | CX-9 | Rear | Expansion Valve |
| 2011 | Mazda | CX-9 | Rear | Expansion Valve |
| 2010 | Mazda | CX-9 | Rear | Expansion Valve |
| 2009 | Mazda | CX-9 | Rear | Expansion Valve |
| 2008 | Mazda | CX-9 | Rear | Expansion Valve |
| 2007 | Mazda | CX-9 | Rear | Expansion Valve |
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