Audi A6 C8 3.0 TDI Diesel NOx Patricle Sensor Pre DPF 4K0907807F

Audi A6 C8 3.0 TDI Diesel NOx Sensor Before DPF is a component from the Engine Sensors & Switches group, responsible for precise measurement of nitrogen oxides in exhaust gases before the particulate filter. A properly selected NOx sensor supports the correct operation of the exhaust system, stable diesel engine characteristics, and compliance with emission standards.

Specifications and technical data

• SKU: 4K0907807F
• Mark: Audi
• Condition: Used
• OEM Part Number: 4K0907807F
• Substitutable numbers: 4K0907807F, 4K0 907 807 F
• Fuel type: Diesel
• Category: Engine Sensors & Switches

Purpose and Function of the NOx Sensor

The presented NOx sensor is dedicated to the 3.0 TDI engine in the Audi A6 C8 generation, where it is installed before the DPF filter. Its task is to continuously monitor exhaust gas composition in the diesel engine, allowing the engine control unit to:

• accurately control fuel injection in Diesel mode,
• optimize the combustion process for NOx emissions,
• cooperate with the exhaust gas purification system before the DPF filter.

This ensures the powertrain maintains stable operating parameters, and the response to load remains predictable and repeatable.

Benefits of Using an Original Audi Sensor

An original Audi NOx sensor from the Engine Sensors & Switches category is designed for a specific 3.0 TDI engine configuration, which translates to consistency with the factory control unit software. In practice, this means:

• correct signal interpretation by the engine electronics without the need for software adaptation,
• preservation of factory injection maps and exhaust gas purification system regeneration strategies,
• reduced risk of diagnostic errors related to incorrect NOx readings.

Choosing an original component helps maintain the consistency of the entire engine control system, which is particularly important in modern diesel engines.

Installation and Operational Characteristics

The NOx sensor before the DPF in the Audi A6 C8 3.0 TDI works with the exhaust system and vehicle electronics as an integral part of the emission control system. During replacement, it is important to follow the correct sequence of service procedures, including:

• proper seating of the sensor in its designated socket in the exhaust system,
• protecting the signal cable from excessive heat and abrasion,
• checking the correctness of the connection to the vehicle's electrical harness.

After installation, it is recommended to perform computer diagnostics to verify readings and potentially clear any previously stored errors related to the NOx system.

Part Condition and Practical Application

The offered NOx sensor is a used component, which is a beneficial solution for users looking for original parts at a reasonable price, while maintaining compliance with factory Audi specifications. This type of part is suitable for both typical exhaust emission system repairs and for diagnosing diesel engine problems, such as power loss or emission error messages.

If you also need other sensors responsible for the engine's operating parameters for your Audi, check the available parts in the Audi Engine Sensors & Switches category.

How to Select and Assemble Used Parts for Audi

When selecting a NOx sensor for the Audi A6 C8 3.0 TDI Diesel, it is crucial to match it to the specific engine version and exhaust system configuration. In practice, it is worth using one-stop-shop solutions that allow you to assemble all necessary powertrain and accessory components in one place. More on how to effectively assemble original used components and avoid problems with cheap aftermarket alternatives can be found in the article Comprehensive Sourcing: From Engine to the Smallest Clip – How to Assemble Used Car Parts in One Place?.

If you are considering whether it is better to opt for a new or used NOx sensor, comparing the costs and durability of different solutions, described in the material Car Parts – New or Used? Comparing Costs, Quality, and Durability, may be helpful.