Audi RS4 B8 4.2 FSI CFSA Vacuum Air Pressure Pipe Line Map Sensor 8T2611931C

Audi RS4 B8 4.2 FSI CFSA Vacuum Air Pressure Pipe Line Map Sensor is a precision component of the petrol engine control system, designed specifically for the high-performance V8 unit. It is responsible for the accurate measurement of vacuum and air pressure, which allows the engine control unit to ensure stable operation, correct fuel metering, and predictable throttle response. By maintaining factory parameters, this sensor is the right choice for repairs and diagnostics of the intake system in the RS4 B8.

Specifications and technical data

• SKU: RHD-8T2611931C
• Mark: Audi
• Condition: Used
• OEM Part Number: 8T2611931C
• Substitutable numbers: 8T2611931C, 8T2 611 931 C
• Fuel type: Petrol
• Category: Other Engine Parts

Purpose and role in the engine system

The presented sensor is dedicated to the 4.2 FSI CFSA unit in the Audi RS4 B8 model powered by petrol. Its task is to continuously measure air parameters in the intake system and the vacuum line, which enables the engine control unit to precisely calculate load, ignition corrections, and fuel dosage.

A stable signal from the vacuum air pressure pipe line map sensor translates into:

• smooth engine operation across the entire rev range,
• repeatable performance characteristic of the RS version,
• more predictable response to load and gear changes,
• more efficient diagnostics of potential leaks in the intake system.

Benefits of using an original Audi component

The original Audi sensor ensures that the electrical and mechanical characteristics comply with the factory requirements of the RS4 B8 engine control unit. This means proper signal scaling, appropriate response speed, and compatibility with the ignition and injection maps prepared for the 4.2 FSI unit.

Key advantages of using this component include:

• guaranteed compatibility with the electrical installation and intake system of the Audi RS4 B8,
• maintenance of the stock engine operating characteristics without the need for software adaptation,
• reduction of the risk of control unit errors resulting from an incorrect sensor signal,
• easier interpretation of logs and parameters during diagnostics.

Performance characteristics and installation

The component comes from the group of used Audi parts, which allows for cost-effective repair while maintaining the original specification. The sensor is structurally prepared for installation in the factory location, using stock mounting points and the original electrical connector.

In practice, this means:

• installation in the intake system without mechanical modifications,
• connection to the wiring harness using the factory plug,
• the possibility of performing standard adaptation and tests in OBD diagnostics after replacement.

Application in service and RS4 modifications

In the case of symptoms such as unstable idle speed, power loss, errors related to manifold pressure, or incorrect mixture corrections, replacing the vacuum air pressure pipe line map sensor is one of the basic service steps. Precise pressure measurement is of particular importance in powerful naturally aspirated units, where the control unit must very accurately map the engine load.

If you want to better understand the structural differences between RS versions and standard Audi models – including the influence of engine equipment, braking systems, and chassis – it is worth reading the article Audi RS vs other models – what is hidden under the hood and chassis?, which discusses the specifics of the RS series in more detail.

Service expansion within the same group of components

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 pressure sensors, vacuum components, or additional control parts, check the available parts in the Other Audi category.