Air con evaporators & expansion valves
Expansion valve is a genuine OEM component designed specifically for Porsche 928 models. As part of the air conditioning system, it regulates refrigerant flow into the evaporator, maintaining correct pressure and ensuring consistent cabin cooling.
Fits:
Porsche 928 1978 - 1982
Porsche 928 1983 - 1986
Chassis no:
F >> 92GS8 40082
F >> 92GS8 49562 (J)
Diagram ref no 35
This expansion valve regulates refrigerant flow between the condenser and the evaporator, keeping system pressure balanced for efficient cooling. By preventing evaporator freeze-up, it also protects the A/C compressor from unnecessary strain. It is mounted within the A/C system, positioned between the condenser and the evaporator.
Over time, expansion valves can clog, stick, or fail, leading to poor cooling, fluctuating cabin temperatures, or excessive load on the compressor. Replacing expansion valve restores factory-correct cooling performance, ensures system longevity, and maintains comfort in your Porsche 928.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
92857312302
The product you are viewing cross references to these numbers
- Porsche 928 4.5L 1978-82
- Porsche 928S 4.7L 1981-83
- Porsche 928S2 4.7L 1984-86
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12 Month Warranty
Worldwide Delivery
Premium aftermarket expansion valve replacing Porsche #92857312302. It regulates refrigerant flow for consistent cooling, with OE-quality durability and long service life.
Fits:
Porsche 928 1978 - 1982
Porsche 928 1983 - 1986
Chassis no:
F >> 92GS8 40082
F >> 92GS8 49562 (J)
Diagram ref no 34
MAHLE’s Premium Line delivers OE-quality performance with precise metering, outstanding durability, and long service life for customers seeking the best.
What this product does:
• Controls refrigerant expansion from high pressure to low pressure before entering the evaporator
• Maintains consistent cooling temperature and pressure within the A/C system
• Protects the evaporator from freezing or flood by managing refrigerant volume
Why replacement matters:
When the expansion valve begins to fail, common symptoms include:
• Poor cooling or inconsistent cabin temperature
• Freezing or frosting of the evaporator High or low pressure abnormalities in the A/C system
• Flooding of refrigerant into the evaporator or compressor damage
Installing a high-quality expansion valve keeps your A/C system working properly, restores cooling efficiency, protects the compressor, and helps prevent costly damage.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
92857312302
The product you are viewing cross references to these numbers
- Porsche 928 4.5L 1978-82
- Porsche 928S 4.7L 1981-83
- Porsche 928S2 4.7L 1984-86
Shop Securely
12 Month Warranty
Worldwide Delivery
Expansion valve regulates refrigerant flow to the evaporator, keeping pressure balanced and cabin cooling consistent. Built to OE specifications, it provides reliable performance and proper fit.
Fits:
Porsche 928 1978 - 1982
Porsche 928 1983 - 1986
Chassis no:
F >> 92GS8 40082
F >> 92GS8 49562 (J)
Diagram ref no 34
Location: Installed in the A/C system, positioned between the condenser and the evaporator.
What this product does:
• Regulates refrigerant flow from high to low pressure
• Maintains optimal evaporator performance for steady cooling
• Protects the A/C compressor and system from pressure imbalance
Why replacement matters:
A faulty expansion valve can cause poor cooling, fluctuating cabin temperatures, evaporator freeze-up, or compressor strain. Replacing valve restores efficient air conditioning, ensures passenger comfort, and protects the A/C system from costly damage.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
92857312302
The product you are viewing cross references to these numbers
- Porsche 928 4.5L 1978-82
- Porsche 928S 4.7L 1981-83
- Porsche 928S2 4.7L 1984-86
Shop Securely
12 Month Warranty
Worldwide Delivery
Porsche Air Conditioning Evaporators & Expansion Valves | Efficient Climate Control & Cooling Precision
The air conditioning evaporator and expansion valve work hand-in-hand to regulate your Porsche’s cabin temperature and cooling performance. The evaporator absorbs heat from the interior air, while the expansion valve controls refrigerant flow and pressure — ensuring optimal cooling efficiency and consistent climate control in all conditions.
At Design911, we supply premium-grade air conditioning evaporators and expansion valves engineered to match or surpass original performance standards. Each component is built from corrosion-resistant aluminium and precision-calibrated materials for maximum reliability, refrigerant control, and long-lasting performance.
Whether you’re restoring your Porsche’s A/C system or repairing poor cooling output, our evaporators and expansion valves guarantee dependable operation and comfort on every drive.
What Do Air Con Evaporators & Expansion Valves Do?
These two critical components form the heart of your Porsche’s A/C cooling system.
Core Functions:
- Evaporator: Cools the cabin by absorbing heat as the refrigerant evaporates.
- Expansion Valve:
Regulates the refrigerant entering the evaporator, maintaining correct
pressure and temperature.
- Ensures steady, efficient cooling in all operating conditions.
- Prevents compressor overload and system freezing.
- Maintains optimal refrigerant balance for comfort and performance.
Why Do Air Con Evaporators & Expansion Valves Fail or Degrade?
These parts operate under constant temperature and pressure fluctuations, making them vulnerable to wear, corrosion, and contamination over time.
Common Causes of Failure Include:
- Corrosion or cracking of the evaporator core.
- Blockage or sticking in the expansion valve from debris.
- Moisture contamination leading to ice build-up inside the system.
- Refrigerant leaks reducing cooling efficiency.
- Age-related deterioration of seals, fins, or fittings.
When these components fail, you may notice weak cooling, fluctuating cabin temperatures, hissing noises, or A/C system fault codes.
Why Replace Your Porsche Air Con Evaporator & Expansion Valve?
Replacing a worn or leaking evaporator and expansion valve restores the A/C system’s ability to maintain stable, efficient cooling. It also prevents costly compressor damage and protects the system from moisture and pressure-related failures.
Key Benefits:
- Restores cold, consistent cabin air flow.
- Prevents refrigerant loss and internal contamination.
- Improves system efficiency and compressor protection.
- Maintains correct refrigerant pressure and flow rate.
- Designed for Porsche 911, Cayman, Boxster, Panamera, Macan, and classic models.
- Ideal for A/C servicing, rebuilds, or performance restoration.
Regular A/C servicing and replacement of worn components ensure long-term comfort, reliability, and system protection.
Highlights
- High-efficiency Porsche A/C evaporators and expansion valves.
- Corrosion-resistant aluminium cores for long-term reliability.
- Precision-engineered for accurate refrigerant flow control.
- Direct-fit designs for Porsche road and performance models.
- Perfect for repairs, restorations, or preventative maintenance.
- Improves cooling performance and system longevity.
