Audi A6 C8 A8 4N Exhaust Gas Temperature Lambda Sensor 3.0 TFSI 8W0919529B

Audi A6 C8 A8 4N Exhaust Gas Temperature Sensor 3.0 TFSI is a precise exhaust system component, designed by Audi for use with 3.0 TFSI gasoline engines. A used sensor from this series ensures stable exhaust gas temperature readings, supporting proper engine control unit operation, emissions control, and safe thermal load of components.

Specifications and technical data

• SKU: 8W0919529B
• Mark: Audi
• Condition: Used
• OEM Part Number: 8W0919529B
• Substitutable numbers: 8W0919529B, 8W0 919 529 B
• Fuel type: Petrol
• Category: Oxygen Sensors

Function and Role of the Exhaust Gas Temperature Sensor

The exhaust gas temperature sensor in a 3.0 TFSI gasoline engine is responsible for continuously measuring the temperature of gases in the exhaust system. Based on this data, the engine control unit adjusts fuel injection, ignition timing, and thermal protection strategies, which translates to stable engine operation and reduced risk of exhaust component overheating.

In Audi A6 C8 and A8 4N models, a properly functioning exhaust gas temperature sensor also supports emissions control systems, helping to maintain operating parameters within the manufacturer's specifications. This allows the engine to maintain optimal dynamics while meeting environmental standards.

Benefits of Using an Original Audi Sensor

Using an original Audi exhaust gas temperature sensor within the Lambda Sensors and O2 Sensors category ensures the original operating characteristics of the engine control system are maintained. The component is structurally matched to the specific 3.0 TFSI application, minimizing the risk of reading errors and electrical compatibility issues.

Key advantages of installing an original sensor include:

• signal consistency with the engine control unit maps designed for the 3.0 TFSI unit,
• proper cooperation with other sensors in the exhaust system,
• reduced risk of diagnostic errors related to exhaust gas temperature,
• maintenance of stable combustion parameters across a wide range of loads.

Product Characteristics and Application

The presented exhaust gas temperature sensor is designed for gasoline engines, which is significant for its temperature characteristics and operating method compared to diesel units. The sensor's construction is adapted to the conditions within the 3.0 TFSI engine's exhaust system, where high temperatures and dynamic load changes occur.

The product comes from the Audi offering and is a measurement component within the Lambda Sensors and O2 Sensors group. Its used condition allows for an economical replacement of a damaged sensor while maintaining the original manufacturer's specifications, which is particularly important in modern engines with advanced control electronics.

Why Consider a Used Exhaust Gas Temperature Sensor

For modern exhaust systems, using a used exhaust gas temperature sensor can be a sensible cost-effective solution, provided it is correctly selected by OEM number and compatible with the specific engine version. A properly selected component retains functionality comparable to a new part, while reducing service costs.

If you want to better understand when choosing used sensors is technically justified, how to check compatibility, and what to pay attention to during installation, check out the Global Parts guide: Used Automotive Electronics Onboard – Why Choose Second-Hand ECUs and Sensors?

Expanding Exhaust System Support in Audi

If you are planning a comprehensive repair or upgrade of the exhaust system area in your Audi and need other components from the same group, such as additional temperature sensors, lambda sensors, or exhaust gas composition sensors, check the available parts in the Audi Lambda Sensors and O2 Sensors category.

This allows you to refresh key measurement components in a single service step, which simplifies diagnostics, stabilizes engine operation, and reduces the risk of the same faults recurring in a short period.