Audi A2 GA 2.0 TDI DTTC Oxygen NOX Sensor Module Control Unit 05L907807BB

Audi A2 GA 2.0 TDI DTTC Oxygen NOX Sensor Module Control Unit is a specialized exhaust system component designed for precise monitoring of exhaust gas composition in a diesel engine. Thanks to its advanced design, the NOx sensor supports the proper operation of the exhaust gas treatment system, which translates into stable engine performance characteristics and compliance with emission standards. This solution is dedicated to users who expect a proven component tailored to a specific engine and transmission configuration.

Specifications and technical data

• SKU: 05L907807BB
• Mark: Audi
• Condition: Used
• OEM Part Number: 05L907807BB
• Substitutable numbers: 05L907807BB, 05L 907 807 BB
• Fuel type: Diesel
• Gearbox type: Automatic
• Category: Oxygen Sensors

Purpose and function in the exhaust system

The presented NOx sensor from the Lambda probes and O2 sensors group operates in the vehicle's exhaust system, measuring the nitrogen oxide content in the exhaust gases. Information from the sensor is used by the engine control unit to adjust the fuel dose and control the exhaust treatment system, which helps maintain an optimal mixture composition and reduce the emission of harmful compounds.

In a vehicle with a diesel engine, the role of the NOx sensor is particularly important for the proper operation of emission reduction systems, such as those with catalytic converters and particulate filters. A functional sensor supports smooth engine operation, stable idle speed, and predictable response to load.

Compatibility with the engine and transmission

The component has been designed to work with a Diesel engine, which means the measurement characteristics are adapted to the specifics of diesel combustion. As a result, the controller receives reliable data across the full range of loads and operating temperatures typical for diesel units.

The sensor is intended for configurations with an automatic transmission, which is significant for torque management strategies and drivetrain operation. A properly functioning NOx sensor helps maintain smooth gear shifting and supports the stability of engine operating parameters in various driving modes.

Product characteristics and service application

The offered component comes from the Audi brand, which ensures a design consistent with the vehicle manufacturer's factory specifications. As a result, the sensor is properly matched to the electrical system architecture and engine control logic, facilitating integration with the existing system.

In service applications, this type of NOx sensor is primarily used for:

• diagnosing exhaust emission problems and errors related to the NOx system,
• restoring the proper operation of the exhaust treatment system after mechanical or electronic repairs,
• resolving issues with uneven engine operation resulting from incorrect exhaust gas composition readings.

For workshops and individual users, this means the possibility of effectively replacing the component when diagnostics indicate improper sensor operation in the exhaust system.

Benefits of using a dedicated NOx sensor

Using the correct NOx sensor in an Audi A2 GA 2.0 TDI DTTC allows for maintaining stable engine operating parameters and the proper functioning of systems responsible for emission reduction. Key benefits include:

• Better emission control – the controller receives reliable data on exhaust gas composition, which makes it easier to maintain compliance with environmental requirements.
• Consistency with factory calibration – the sensor is matched to the engine control strategy in a given model, which promotes predictable vehicle behavior.
• Support for diagnostics – a properly functioning sensor facilitates the interpretation of error codes and reduces the time spent searching for the causes of faults in the exhaust system.

Thanks to this, replacing a damaged component with the appropriate NOx sensor is one of the key steps in the comprehensive maintenance of the emission system in modern diesel units.

System expansion and additional materials

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 additional oxygen sensors, control probes, or diagnostic probes, check the available parts in the Audi Lambda probes and O2 sensors category.

To better plan the use of electronic components in the vehicle and make informed choices when selecting used parts, it is worth reading the guide on our blog: The second life of electronics – when is it worth choosing used engine controllers, comfort modules, and parking sensors?. You will find practical tips there regarding the selection and verification of automotive electronics, which may also be helpful when working with sensors in the exhaust system.