Audi A4 B9 A6 C8 A7 4K Q5 FY Exhaust Gas Temperature Sensor 2.0 TDI 05L906088BN

Audi A4 B9 A6 C8 A7 4K Q5 FY Exhaust Gas Temperature Sensor 2.0 TDI is an original component from the Lambda sensors and O2 sensors group, designed for precise monitoring of exhaust gas temperature in Audi diesel engines. Thanks to its factory origin, it ensures proper cooperation with the vehicle's electronics and stable operating parameters of the exhaust system. This is a solution for users who expect proven compatibility with the 2.0 TDI unit in the listed models.

Specifications and technical data

• SKU: 05L906088BN
• Mark: Audi
• Condition: Used
• OEM Part Number: 05L906088BN
• Substitutable numbers: 05L906088BN, 05L 906 088 BN
• Category: Oxygen Sensors

Purpose and function of the exhaust gas temperature sensor

The exhaust gas temperature sensor in Audi A4 B9, A6 C8, A7 4K, and Q5 FY models with a 2.0 TDI engine is responsible for the continuous measurement of gas temperature in the exhaust system. This information is used by the engine control unit to monitor the operation of the exhaust gas treatment system, fuel dosage, and regeneration strategies for components responsible for emission reduction. A properly functioning sensor helps maintain stable engine operating characteristics and reduces the risk of overheating components in the exhaust path.

Benefits of using an original Audi component

Choosing an exhaust gas temperature sensor from the Audi range means maintaining factory operating parameters. An element from the same group as other Lambda sensors and O2 sensors in the vehicle ensures:

• proper cooperation with the engine control unit software,
• appropriate measurement characteristics across the full range of operating temperatures,
• reduced risk of diagnostic errors related to incorrect exhaust gas temperature readings.

By maintaining compliance with factory specifications, the installation of such a sensor is particularly beneficial in cars used daily, where operational repeatability and predictable drivetrain reactions are essential.

Operational and installation characteristics

The offered sensor is a used component, which allows for reduced repair costs while maintaining the original design and fitment for installation in Audi A4 B9, A6 C8, A7 4K, and Q5 FY with a 2.0 TDI engine. As a component from the Lambda sensors and O2 sensors category, it has been designed to operate in demanding thermal and mechanical conditions typical of the exhaust system zone.

When selecting and installing, it is worth paying attention to:

• compatibility with the specific 2.0 TDI engine version in the given Audi model,
• correct seating of the sensor in the designated socket in the exhaust system,
• secure connection to the vehicle's electrical harness to ensure a stable signal reading.

Application in diagnostics and maintaining exhaust system efficiency

A functional exhaust gas temperature sensor is crucial for the diagnostics and long-term operation of the 2.0 TDI unit. Incorrect readings can lead to:

• suboptimal operation of the exhaust gas treatment system,
• increased fuel consumption,
• appearance of error messages and emergency mode.

Replacing it with an original Audi component allows for the restoration of correct measurement values and facilitates further diagnostics of potential faults within the exhaust system and engine control.

Technical support and selection of used electronics

When working with measurement and electronic components in modern vehicles, it is worth using reliable sources of knowledge. If you want to better understand when choosing used electronic components – such as controllers, modules, or sensors – is technically justified, check out the article The second life of electronics – when is it worth choosing used engine controllers, comfort modules, and parking sensors?.

Expansion of the measurement system in Audi

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 temperature sensors, lambda sensors, or exhaust gas composition sensors, check the available parts in the Audi Lambda sensors and O2 sensors category.