Audi A4 B8 A5 S5 8T Expansion Valve Air Conditioning A/C 8K0820679B

Audi A4 B8 A5 S5 8T Expansion Valve Air Conditioning A/C is an original cabin cooling system component, designed by the Audi brand to ensure stable air conditioning operation in demanding conditions. The precise design of the valve allows for proper expansion of the refrigerant, which translates into uniform interior cooling and predictable behavior of the entire system.

Specifications and technical data

• SKU: 8K0820679B
• Mark: Audi
• Condition: Used
• OEM Part Number: 8K0820679B
• Substitutable numbers: 8K0820679B, 8K0 820 679 B, 95002
• Part type: A/C Expansion Valve
• Category: A/C Expansion Valves

Purpose and function in the air conditioning system

The presented valve belongs to the group of components known as Expansion valves, responsible for the controlled reduction of refrigerant pressure before the evaporator. In practice, this means that this component:

• stabilizes refrigerant flow depending on system operating conditions,
• influences cabin cooling efficiency under various thermal loads,
• limits the risk of excessive pressure on the low-pressure side, protecting other air conditioning components.

Thanks to its factory fit for the Audi A4 B8 platform and the A5 and S5 8T models, the valve works with the standard air conditioning installation, maintaining the parameters specified by the vehicle manufacturer.

Benefits of using an original expansion valve

Using an original valve instead of a worn-out component allows for restoring the correct air conditioning operating characteristics without interfering with the system's design. Key advantages include:

• Factory fit – maintaining the correct refrigerant expansion point and compatibility with other Audi air conditioning components.
• Consistency of operating parameters – predictable operating pressures and stable air outlet temperature, which facilitates diagnostics and service.
• Hassle-free installation – the ability to install it in place of the original component without modifying the piping or mounts.

Choosing an original expansion valve is particularly important for professional air conditioning system repairs, where parameter repeatability and compliance with service documentation are essential.

Product characteristics and condition

The offered item comes from the Audi parts line and is classified as used, which allows for combining reasonable cost with the preservation of the original design specification. This type of component, sourced from dismantling, is frequently chosen in situations where priority is given to compliance with the factory system design and reducing repair costs compared to purchasing a new part.

This type of expansion valve is particularly useful during comprehensive air conditioning maintenance, including dryer replacement, leak testing, and system refilling. Replacing the valve during such a procedure helps minimize the risk of subsequent cooling performance drops resulting from operating with a worn-out component.

Technical support and component selection

In the case of air conditioning systems, it is crucial to properly select components within the same functional group. If you are planning a comprehensive repair or upgrade of the air conditioning area in your Audi and need other elements from the same group, such as additional valves, control elements, or regulation components, check the available parts in the Audi Expansion Valves category.

For users interested in a broader context of using flow control elements in modern engine systems and accessories, a valuable addition to your knowledge may be an article describing the advantages of using original used components in exhaust gas recirculation systems. You can find more information in the blog post EGR: what it is and why it is worth considering used EGR valves, which discusses the practical aspects of selecting and operating valves sensitive to operating conditions.

Summary

Audi A4 B8 A5 S5 8T Expansion Valve Air Conditioning A/C is a technically matched, original cabin cooling system component intended for professional repairs and service of Audi vehicles. Choosing this component allows you to maintain factory air conditioning operating parameters, reduce the risk of cooling performance issues, and keep the entire system consistent with the vehicle manufacturer's specifications.