Audi RS4 B8 Avant 4.2 Petrol FSI Air Guide Right O/S Coolant Radiator 8K0121284R

Audi RS4 B8 Avant 4.2 Petrol FSI Air Guide Right O/S Coolant Radiator is an original cooling system component, designed specifically for the 4.2 FSI petrol version. This factory air guide directs the cooling airflow directly onto the radiator, supporting stable engine operating temperatures and maintaining the sporty performance of the RS4. As a part from the Air intakes category, it is an important element of the airflow path in the front section of the bodywork.

Specifications and technical data

• SKU: 8K0121284R
• Mark: Audi
• Condition: Used
• OEM Part Number: 8K0121284R
• Substitutable numbers: 8K0121284R, 8K0 121 284 R
• Location on the vehicle: Front, Right
• Fuel type: Petrol
• Category: Air Dams

Purpose and technical function

The presented air guide has been designed for installation in the front, right side of the engine bay, in the immediate vicinity of the coolant radiator. Its task is to:

• direct the airflow to the radiator while driving,
• reduce air turbulence in the radiator zone,
• support efficient heat dissipation from the petrol engine cooling system,
• maintain stable thermal conditions during dynamic driving.

Thanks to its precise fit to the RS4 B8 Avant body, the component works with other covers and air ducts, creating a coherent, efficient cooling system.

Construction and fitment for Audi RS4 B8 Avant

The air guide for the radiator is a design developed by the vehicle manufacturer, which guarantees the preservation of the factory airflow geometry. The shape and mounting points are adapted to the bumper, radiator, and adjacent components, ensuring that installation is predictable and repeatable.

The component is intended for use with the FSI petrol engine, which is significant for the thermal characteristics of the power unit. A properly directed airflow helps maintain the correct operating temperature during daily use and under loads typical for a car with sports performance parameters.

Condition, origin, and service application

The offered part comes from dismantling and is intended for re-installation in a vehicle where restoring the factory airflow path is required. It is particularly useful in situations where:

• the front part of the body has been damaged and it is necessary to replace the air guiding elements,
• the original guide is missing after previous repairs,
• you want to restore the full efficiency of the cooling system in your Audi RS4 B8 Avant.

Using an original component allows you to maintain structural consistency with other cooling system components and avoid fitment issues typical of replacements with universal geometry.

Benefits of installing an original air guide

Installing this air guide in an Audi RS4 B8 Avant 4.2 FSI brings a number of practical benefits:

• maintaining stable engine operating temperature at higher speeds,
• better radiator efficiency thanks to directed airflow,
• reducing the risk of overheating under high load conditions,
• maintaining original aerodynamics in the front part of the vehicle.

For users who are planning a wider modernization or restoring the factory specification of the car, the article on vehicle retrofitting may be useful: professional retrofit using original parts from dismantling.

Integration with other elements and car project development

The air guide works with other elements from the Air intakes group, creating a complete system for directing airflow in the front part of the vehicle. During post-accident repairs or restoring the car to a factory-like condition, it is worth paying attention to the consistency of all ducts, covers, and guides to fully utilize the potential of the cooling system and maintain the characteristic driving properties of the Audi RS4 B8 Avant.