Volkswagen Caddy Mk4 Sharan Mk2 NOX Sensor Module 2.0 TDI 5WK96621K 04L907805N

Volkswagen Caddy Mk4 Sharan Mk2 NOX Sensor Module 2.0 TDI is an item from the Lambda sensors and O2 sensors category, responsible for the precise measurement of nitrogen oxides in the exhaust gases of a diesel engine. A properly functioning NOX sensor supports the stable operation of the exhaust gas treatment system, facilitates compliance with emission standards, and helps maintain the correct performance characteristics of the 2.0 TDI unit. This component is designed for use in Volkswagen vehicles, particularly in the Caddy Mk4 and Sharan Mk2 models.

Specifications and technical data

• SKU: 04L907805N
• Mark: Volkswagen
• Condition: Used
• OEM Part Number: 04L907805N
• Substitutable numbers: 04L907805N, 04L 907 805 N
• Category: Oxygen Sensors

Function and role of the NOX sensor in the exhaust system

The NOX sensor in the 2.0 TDI engine monitors the exhaust gas composition for nitrogen oxide content, transmitting data to the engine control unit. Based on this information, the ECU adjusts the fuel dosage, the operation of the exhaust gas recirculation system, and the regeneration strategy for exhaust treatment components. This makes it possible to maintain stable engine performance parameters, reduce emissions, and ensure compliance with environmental requirements.

A functional NOX sensor also helps reduce the risk of the engine entering limp mode, prevents excessive fuel consumption, and supports the smooth operation of the 2.0 TDI unit under typical urban and extra-urban driving conditions.

Why it is worth using an original Volkswagen component

The original NOX sensor designed for the Volkswagen Caddy Mk4 and Sharan Mk2 ensures a proper fit for the vehicle's electrical installation and exhaust system. Using a component from the same design group as the factory-fitted part minimizes the risk of compatibility issues, diagnostic errors, and incorrect readings in the engine control unit.

Key advantages of using an original NOX sensor include, among others:

• maintaining the factory performance characteristics of the 2.0 TDI unit,
• proper cooperation with the engine control unit software,
• stable measurement values across a wide range of loads,
• reduced risk of further service intervention after installation.

Product characteristics and application

The presented NOX sensor belongs to the group of exhaust system measurement elements, classified as Lambda sensors and O2 sensors. It is a component intended for Volkswagen vehicles equipped with a 2.0 TDI unit in a configuration compatible with the Caddy Mk4 and Sharan Mk2 models. The product comes from dismantling, which allows for the cost-effective restoration of the emission control system's efficiency while maintaining the original part design.

Due to the specific nature of the NOX sensor's operation, its replacement is particularly recommended in situations where errors related to exhaust emissions, power loss, or unstable engine operation under partial load occur. A properly selected component helps restore the correct performance parameters of the engine without the need to interfere with other sub-assemblies.

Benefits of choosing a used NOX sensor

Choosing a used NOX sensor for a Volkswagen can be a sensible cost-saving solution, especially when appropriate diagnostic and installation procedures are followed. This type of component allows for reduced expenses related to exhaust system repairs while enabling the vehicle to maintain its original specifications.

If you want to better understand when the use of used electronic components makes sense, how to assess their suitability, and what to pay attention to during installation, it is worth reading our guide: The second life of electronics – when is it worth choosing used engine controllers, comfort modules, and parking sensors?.

Installation and operational recommendations

When replacing the NOX sensor in a Volkswagen Caddy Mk4 or Sharan Mk2, it is recommended to perform a full diagnostic of the exhaust system and clear any stored errors in the engine control unit after installation. It is also worth checking the condition of the electrical wiring harness and connectors to ensure a stable connection and correct signal reading.

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