Audi RS6 C7 4.0 TFSI CRDB Petrol Secondary Air Pump Filter 4G0129955A

Audi RS6 C7 4.0 TFSI CRDB Petrol Secondary Air Pump Filter is an original air intake system component designed for the 4.0 TFSI petrol engine with the CRDB code. Thanks to its factory design, Audi ensures proper operation of the secondary air injection system, which supports the engine's performance and stable exhaust emission parameters in the sporty RS6 C7.

Specifications and technical data

• SKU: 4G0129955A
• Mark: Audi
• Condition: Used
• OEM Part Number: 4G0129955A
• Substitutable numbers: 4G0129955A, 4G0 129 955 A
• Fuel type: Petrol
• Category: Secondary Air & Smog Pumps

Purpose and function in the secondary air system

The presented filter works with the secondary air pump in the petrol supply system, responsible for cleaning the air drawn into the system. In the 4.0 TFSI CRDB engine, this component:

• protects the secondary air pump from environmental contaminants,
• supports stable operation of the emission reduction system during the engine warm-up phase,
• reduces the risk of premature wear of pump components and control valves,
• maintains proper airflow in accordance with Audi's design specifications.

As a result, the secondary air injection system in the RS6 C7 maintains its efficiency, which is important for both exhaust parameters and the overall reliability of the powertrain.

Benefits of using an original filter

Using an original secondary air pump filter in the Audi RS6 C7 4.0 TFSI provides a number of practical operational benefits:

• Factory fit – geometry and mounting method are consistent with the solutions provided by the vehicle manufacturer.
• Consistency with petrol engine characteristics – the component is designed for the specific operating conditions of the 4.0 TFSI CRDB unit.
• Stable airflow – the filter does not excessively restrict pump performance, which promotes proper system operation.
• Reduction of the risk of diagnostic errors related to improper operation of the secondary air system.

Choosing an original component is particularly important in high-performance cars such as the RS6 C7, where precision in the operation of auxiliary systems affects the durability of the entire powertrain.

Product characteristics and installation

The filter belongs to the Secondary air pumps group and is designed to work with the system in a petrol engine. The design provided by Audi allows for installation in the factory location without the need for system modifications.

Before installation, it is recommended to:

• verify compatibility by OEM number or VIN,
• check the condition of the air supply and discharge hoses,
• check the tightness of connections after installing the filter.

This approach allows for restoring proper operating conditions for the entire secondary air system during a single service operation.

Part condition and service application

The offered filter is a used component, making it an attractive solution for budget repairs or restoring the factory configuration of the system in an Audi RS6 C7. For many users, this is a reasonable compromise between cost and maintaining the vehicle's original specifications.

It is particularly useful in situations where:

• a quick replacement of a damaged filter is necessary,
• the secondary air pump has been serviced or replaced and it is recommended to check accompanying components simultaneously,
• diagnostic errors related to the operation of the secondary air system in the petrol engine appear.

System expansion and selection of other components

If you are planning a comprehensive repair or upgrade of the engine area in your Audi and need other components from the same group, such as secondary air hoses, control valves, or the pump itself, check the available parts in the Audi secondary air pumps category.

When working on a petrol unit, it is also worth ensuring the correct selection and diagnostics of fuel supply components. A detailed discussion of operating principles, selection by numbers, and maintenance can be found in the article Fuel system – injectors, pumps, and fuel tank: maintenance and regeneration, which may be helpful when planning broader service work.

If you are interested in a broader context of RS model construction, differences in the design of engines, auxiliary systems, and chassis compared to standard Audi versions, it is worth reading the material Audi RS vs other models – what is hidden under the hood and chassis?, which helps to better understand the specifics of sporty variants such as the RS6 C7.