Audi A8 D3 A6 C6 Exhaust Gas Temperature NOX Lambda Probe Sensor 1K0998262S

Audi A8 D3 A6 C6 Exhaust Gas Temperature NOX Lambda Probe Sensor is a component from the Temperature sensors group, designed for gasoline fuel systems in Audi vehicles. It is responsible for the precise measurement of exhaust gas parameters, which supports the proper operation of the engine control unit, a stable air-fuel mixture, and emission control.

Specifications and technical data

• SKU: 1K0998262S
• Mark: Audi
• Condition: Used
• OEM Part Number: 1K0998262S
• Substitutable numbers: 1K0998262S, 1K0 998 262 S, 0 258 010 036, 0258010036
• Fuel type: Petrol
• Part type: Sensor
• Category: Temperature Sensors

Purpose and function in the exhaust system

The described sensor operates in the exhaust gas stream, monitoring their temperature and the parameters necessary for adjusting the mixture composition. In Audi A8 D3 and A6 C6 gasoline engines, this component is essential for:

• maintaining the correct air-fuel mixture composition under various load conditions,
• proper operation of the exhaust gas purification system,
• stable operation of the power unit during start-up and warm-up,
• monitoring the condition of exhaust components by the engine control unit.

Thanks to this, the control unit can react faster to changes in operating conditions, which translates into more predictable vehicle behavior and reduces the risk of emission-related errors.

Benefits of using an original Audi sensor

Choosing an exhaust gas temperature sensor and lambda probe from the Audi OE parts group ensures compatibility with the factory electrical installation and compliance of the measurement characteristics with the control unit software. In practice, this means:

• reliable cooperation with the factory diagnostic system,
• preservation of factory injection and ignition maps without the need for adaptation,
• reduced risk of errors related to incorrect sensor signals.

A component from this group, even as a used OEM component, often allows for restoring the proper operation of the exhaust system at a lower cost than a new part, while maintaining the factory performance characteristics.

Application in gasoline engines

The sensor has been designed to work with units powered by gasoline fuel. In such systems, a quick reaction to changes in exhaust gas temperature and an accurate reading of the mixture composition are particularly important, which affects:

• efficient operation of the catalytic converter and other exhaust gas purification components,
• reduced fuel consumption in urban and extra-urban conditions,
• maintaining engine refinement during dynamic acceleration.

Selecting the right temperature sensor and lambda probe for a specific engine version is crucial to avoid adaptation problems and incorrect readings in the diagnostic system.

Condition, installation, and practical aspects

The offered item is used, which allows for an economical repair of the exhaust system while maintaining the manufacturer's original specifications. Before installation, it is worth paying attention to:

• proper routing of the cable and protecting it from overheating,
• precise seating of the thread in the manifold socket or exhaust section,
• checking electrical connectors for cleanliness and lack of corrosion.

A properly selected and installed exhaust gas temperature NOX sensor / lambda probe helps limit the appearance of warning lights on the dashboard and supports maintaining stable engine operating parameters in the long term.

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, probes, or control elements, check the available parts in the Audi temperature sensors category.

Technical support and additional information

During service work related to the exhaust system and engine control, it is worth remembering the influence of the power unit's operating temperature on the durability of sensors and other components. High thermal loads can accelerate the wear of measuring elements, which is why maintaining an efficient cooling system is essential.

To better understand how thermal conditions affect engine components and how to wisely use the used parts market, check out the guide Summer heat vs. cooling system: used radiators and fans as a guarantee of savings, which discusses practical aspects of operation and component selection in high temperatures.