Original Subaru Japan A/C Thermostatic Expansion Valve OEM PN 73531-FJ010 Fits Forester / Impreza / Crosstrek / WRX & WRX STI (2015 2020)

Cross Reference Part Numbers

1. Main Subaru OEM Number: 73531-FJ010 (short code: 73531FJ010)
2. Supersession interchange OE revisions:

• 72133-FJ010
• 73548-FJ000
• 73548-YC000

Exact Vehicle Fitment (2015–2020 Production)

1. Subaru Forester SJ 2.5i / 2.0XT Turbo
2. Subaru Impreza GP/GJ 1.6L / 2.0L NA
3. Subaru Crosstrek / XV GP 2.0i & Hybrid
4. Subaru WRX VA 2.0L FA20F Turbo
5. Subaru WRX STI VA 2.5L EJ257 Turbo
    
   Covers all sedan/hatchback body styles, vehicles equipped with standard single-evaporator automatic/manual HVAC systems.

Technical Specifications

1. Valve Type: Block thermostatic expansion valve with external equalizer & capillary sensing bulb
2. Origin: Original OEM unit made in Japan for Subaru assembly line
3. Compatible Refrigerant: R134a
4. Rated Cooling Capacity: 2.0 ton automotive AC standard
5. Housing Material: High-strength anti-corrosion integral aluminum alloy
6. Working Temperature Range: -40℃ ~ +120℃, stable under high dashboard heat
7. Sealing: OEM matched high-temperature resistant rubber O-rings
8. Factory Inspection: 100% hydraulic leak pressure test before packaging
9. Quality Standard: IATF16949 automotive OEM production certification

Core Functions

1. Throttle high-pressure liquid refrigerant into low-pressure atomized mist to realize heat absorption cooling inside evaporator
2. Real-time detect evaporator outlet temperature via capillary tube, automatically adjust refrigerant flow to avoid evaporator ice blockage
3. Balance AC system high/low pressure to maintain consistent cold air output during idle, highway driving and high-temperature summer conditions
4. Isolate high-pressure liquid and low-pressure gaseous refrigerant to sustain normal refrigeration cycle operation

Common Malfunctions Resolved

• Weak & inconsistent cold air output under high ambient temperature
• Continuous evaporator frosting leading to complete airflow blockage from vents
• Intermittent loss of cold air during long-distance driving
• Severe fluctuation of AC system pressure triggering compressor protection shutdown
• Micro refrigerant leakage at valve flange joints
• HVAC ECU storing refrigerant flow imbalance fault codes

Product Advantages

1. Authentic Subaru Japan original OEM part, identical internal calibration and flow precision as factory-fitted components
2. Integrated capillary sensing bulb with stable temperature feedback, no performance drift after long service life
3. One-piece aluminum body with precision robotic welding eliminates hidden internal leakage risks
4. Exact OEM flange dimensions and mounting layout, no pipe bending or adapters required during installation
5. Heat-resistant internal sealing components, resistant to softening and leakage under long-term dashboard heat exposure
6. Single part covers multiple supersession OEM numbers to reduce warehouse SKU inventory costs

Package Includes

Installation Guidance

1. Fully recover all R134a refrigerant from the AC system before removing dashboard heater box components
2. Disconnect vehicle 12V battery negative terminal to avoid ECU short-circuit damage
3. Replace receiver drier synchronously when overhauling the expansion valve to filter metal debris inside pipelines
4. Maintain vacuum pumping for minimum 45 minutes prior to refilling refrigerant
5. Test cooling performance at idle and road driving speeds after installation

Warehouse SKU