Audi RS4 B7 4.2 FSI Throttle Body Air Valve Intake Petrol 079133062A

Audi RS4 B7 4.2 FSI Throttle Body Air Valve Intake Petrol is an intake system component responsible for precise air metering to the engine, which is crucial for the stable operation of the 4.2 FSI unit. A properly selected throttle body in a petrol engine ensures predictable throttle response, correct idle performance, and the right conditions for mixture combustion. This component from the Throttle Bodies group is designed for use in Audi vehicles with a petrol-powered unit.

Specifications and technical data

• SKU: 079133062A
• Mark: Audi
• Condition: Used
• OEM Part Number: 079133062A
• Substitutable numbers: 079133062A, 079 133 062 A
• Fuel type: Petrol
• Part type: Throttle Body
• Category: Throttle Bodies

Function of the throttle body in the 4.2 FSI engine

The throttle body in an FSI petrol engine acts as a precise valve regulating the amount of air drawn into the intake manifold. In conjunction with the fuel injection system and the engine control unit, it is responsible for:

• stabilizing idle speed under various electrical and mechanical loads,
• smooth transition between partial and full load,
• maintaining the correct mixture composition across the entire RPM range,
• consistent response to the accelerator pedal signal. For the 4.2 FSI unit, a properly functioning throttle body is important for both dynamics and engine refinement, reducing the risk of idle fluctuation or delayed throttle response.

Construction and technical characteristics

The throttle body from this series is an integrated component where the housing, control flap, and electric actuator work with position sensors. This allows the engine control unit to adjust the flap opening angle in real-time depending on load, temperature, and torque demand. In practice, this means that the air valve in this model is adapted to operate in a demanding environment of high temperatures and variable pressures in the intake system. The design intended for a petrol engine ensures appropriate flow capacity and operating characteristics matched to the high-revving nature of the 4.2 FSI unit.

Application in the petrol system

In petrol-powered engines, such as the 4.2 FSI, the throttle body is one of the main elements influencing:

• proper engine starting in both cold and warm conditions,
• maintaining stable idle speed in urban driving conditions,
• appropriate response to sudden accelerator pedal input,
• reducing power drops resulting from insufficient air supply. Selecting a component dedicated to the petrol unit allows for maintaining consistency of operating parameters with factory controller settings, which is important during diagnostics and potential throttle body adaptation after installation.

Condition, fitment, and installation aspects

The offered throttle body belongs to the group of used parts, which allows for an economical replacement of the component while maintaining the manufacturer's original specifications. For Audi users, it is important that the component comes from the same design family, which facilitates fitting to the existing intake system and electrical installation. Before installation, standard service procedures are recommended, such as checking the intake system for leaks, inspecting the condition of vacuum hoses, and performing a throttle body adaptation using an appropriate diagnostic interface. Such an approach minimizes the risk of controller errors and allows for fully utilizing the component's potential.

Benefits of using an original Audi throttle body

Using a throttle body dedicated to the Audi RS4 B7 4.2 FSI allows for maintaining consistency of operating parameters with the vehicle's factory configuration. In practice, this translates into:

• stable engine operation across the entire RPM range,
• predictable throttle response, essential for dynamic driving,
• easier diagnostics in case of potential intake system faults,
• maintaining engine operating characteristics in accordance with the manufacturer's specifications. For users who value the consistent operation of the drivetrain, this is a solution that allows maintaining proper operating parameters without the need to interfere with the controller maps. If you are planning a comprehensive repair or upgrade of the engine area in your Audi and need other elements from the same group, such as throttle housings, air control valves, or intake control elements, check the available parts in the Audi Throttle Bodies category. For drivers interested in a broader approach to selecting used components for a car, including the impact on handling and vehicle characteristics, the guide article Stock vs. sports suspension – differences in construction and is it worth buying used suspension parts? may be helpful, as it shows practical aspects of choosing parts based on real operating conditions.