Citroen Relay III Oxygen NOx Lambda Exhaust Sensor HDi Diesel 9820566180

Citroen Relay III Oxygen NOx Lambda Exhaust Sensor HDi Diesel is a specialized exhaust system component designed for diesel engines. It is responsible for the precise measurement of exhaust gas composition, which supports the proper operation of the exhaust gas treatment system and ensures stable engine performance. By using an original solution from the Lambda sensors and O2 sensors category, it is possible to maintain correct emission parameters and ensure the proper functioning of the engine control unit.

Specifications and technical data

• SKU: 9820566180
• Mark: Citroën
• Condition: Used
• OEM Part Number: 9820566180
• Substitutable numbers: 9820566180
• Fuel type: Diesel
• Category: Oxygen Sensors

Function and application of the NOx sensor / lambda probe

The presented sensor operates in the exhaust system of a diesel engine, monitoring the content of nitrogen oxides and oxygen in the exhaust gases. Based on this data, the engine control unit adjusts the fuel dosage, the operation of the injection system, and the exhaust gas treatment strategy, which helps maintain stable power, correct combustion, and compliance with emission standards. In vehicles with HDi units, the role of such a component is particularly important for the proper operation of emission reduction systems.

Benefits of using an original Citroën component

Using a sensor from the Citroën range allows you to maintain the factory operating parameters of the exhaust system and engine control. The original design ensures a proper fit for the electrical installation and the designated mounting location in the exhaust system, which reduces the risk of installation errors and compatibility issues. For diesel engines, this has a direct impact on engine refinement, fuel consumption, and the stability of OBD diagnostic systems.

Performance characteristics and installation

The offered component comes from a group of parts designed for diesel-powered engines, where operating conditions in the exhaust system are demanding in terms of temperature and exhaust gas composition. The NOx / lambda sensor works with the vehicle's electronics, transmitting measurement signals to the controller, which then monitors the combustion process and the operation of exhaust gas treatment systems. When replacing, it is recommended to follow the manufacturer's service procedures, including proper cable routing and correct connector connection, to ensure stable readings and trouble-free operation.

Condition and suitability for Diesel engines

The product is offered as a used part, which is a cost-effective solution for users looking for an economical yet functional alternative to a new component. The sensor is intended for use in Diesel engines where exhaust gas composition control using NOx sensors and lambda probes is required. Such components are particularly important in vehicles used intensively, where the exhaust system and emission control systems operate continuously.

Exhaust system expansion and electronics selection

If you are planning a comprehensive repair or upgrade of the engine area in your vehicle and want to better understand the rationale behind using used control modules and sensors, it is worth checking out the guide on selecting parts by identification numbers, hardware and software compatibility, and installation principles – this is discussed in detail in the article Used automotive electronics on board – why choose second-hand ECU modules and sensors?.

If you are planning a comprehensive repair or upgrade of the engine area in your Citroen and need other components from the same group, such as lambda probes, oxygen sensors, or NOx sensors, check out the available parts in the Citroen lambda sensors and O2 sensors category.