Audi RS4 B7 Air Conditioning Compressor 4.2 FSI Petrol BNS Quattro 4F0260805AH

Audi RS4 B7 Air Conditioning Compressor 4.2 FSI Petrol BNS is an original cabin cooling system component designed for vehicles with a petrol engine. This used compressor from the Air conditioning compressors and clutches group allows for a technically sound repair of the air conditioning system without the need to invest in expensive replacements. It is a solution for drivers who expect factory-fitment and stable air conditioning performance.

Specifications and technical data

• SKU: 4F0260805AH
• Mark: Audi
• Condition: Used
• OEM Part Number: 4F0260805AH
• Substitutable numbers: 4F0260805AH, 4F0 260 805 AH
• Fuel type: Petrol
• Part type: Compressor & Clutch Assembly
• Category: A/C Compressors & Clutches

Purpose and compatibility with the 4.2 FSI unit

The presented compressor is structurally adapted for operation in the air conditioning systems of vehicles with a petrol engine, ensuring proper load on the accessory drive and correct interaction with the control system. The component has been designed to meet the requirements of the dynamic drivetrain characteristic of the RS version, allowing it to maintain stable operating parameters even at higher engine speeds. Selecting a compressor dedicated to a specific Quattro drivetrain configuration reduces the risk of installation issues, incorrect accessory belt tension, or improper operation of the compressor clutch. This is particularly important in high-power vehicles, where the air conditioning system operates under more demanding thermal conditions.

Technical characteristics and role in the air conditioning system

The air conditioning compressor in this model is responsible for compressing the refrigerant and maintaining the appropriate pressure in the circuit, which directly translates to the cooling efficiency of the interior. The design intended for use with a petrol unit ensures:

• properly selected drive ratio relative to the engine characteristics,
• correct interaction with the compressor clutch and engine accessories,
• stable operating pressure within typical air conditioning system load ranges. As a result, the air conditioning system can maintain repeatable cooling parameters both in city traffic and during long highway drives. Using an OEM component allows for the preservation of factory control logic and communication with the vehicle's electronics, which is important for diagnostics and subsequent maintenance.

Benefits of using an original used compressor

Using an original, used air conditioning compressor in an RS-class vehicle has several practical advantages:

• Factory fitment – maintaining the original mounting geometry and position of connection ports facilitates installation and reduces the need for modifications.
• Consistency with the control system – the compressor's operating parameters are consistent with the maps stored in the vehicle's control units, which reduces the risk of errors and diagnostic messages.
• Reasonable repair cost – a used OEM component often represents a favorable compromise between price and quality, especially when repairing advanced sports models. Before installation, a standard service procedure is recommended: checking the system for leaks, replacing the receiver-drier, verifying the quantity and type of refrigerant, and properly venting the system. This approach increases the chance of long-term and stable operation of the entire system.

Component condition and installation recommendations

The compressor is offered as a used part, which in practice means that before installation, it is worth performing a basic visual assessment and – if possible – verification at a service station. It is also recommended to:

• check the cleanliness of the lines and the condenser,
• replace seals at critical points in the system,
• check the condition of the accessory drive belt. An installation prepared in this way reduces the risk of needing to re-intervene in the air conditioning system and allows you to fully utilize the potential of the installed compressor. This is especially important in high-power vehicles, where every accessory component operates under greater thermal and mechanical stress.

Technical support and related products

If you are planning a comprehensive repair or upgrade of the air conditioning system in your Audi and need other components from the same group, such as compressors, clutches, or related drive components, check the available parts in the Audi air conditioning compressors and clutches category. When deciding to use a used compressor, it is worth familiarizing yourself with practical tips regarding the selection and inspection of the component before installation – this is discussed in detail in the article No cooling in the car: original used air conditioning compressor as a proven alternative to expensive new parts, where you will find information on diagnostics, typical symptoms of failure, and recommended service procedures.