Land Rover Discovery Sport L550 NOx Oxygen Sensor 2.0 Diesel GH22-5J299-AB

Land Rover Discovery Sport L550 NOx Oxygen Sensor 2.0 Diesel is a precision component of the exhaust emission control system in diesel engines, designed specifically for Land Rover vehicles. It is responsible for the accurate measurement of nitrogen oxides in the exhaust stream, which allows the engine control unit to effectively regulate the operation of the powertrain and the exhaust aftertreatment system. Thanks to this component, it is possible to maintain stable engine operating parameters, compliance with emission standards, and reduce the risk of the vehicle entering limp mode.

Specifications and technical data

• SKU: GH22-5J299-AB
• Mark: Land Rover
• Condition: Used
• OEM Part Number: GH22-5J299-AB
• Substitutable numbers: GH22-5J299-AB, GH225J299AB, LR071822
• Fuel type: Diesel
• Rim width: 5
• Category: Oxygen Sensors

Purpose and function in the exhaust system

The presented NOx sensor operates in the diesel engine's exhaust system, monitoring the exhaust composition for nitrogen oxide content. Based on its signal, the engine control unit adjusts the fuel dose, the operation of the injection system, and the exhaust aftertreatment strategy, which has a direct impact on the engine's performance, fuel consumption, and emission levels. In practice, a functional NOx sensor helps to reduce:

• the appearance of errors related to exhaust emissions and exhaust system operation,
• power drops resulting from entering limp mode,
• excessive load on components responsible for emission reduction.

Compatibility with the 2.0 Diesel engine

The discussed component has been developed to work with the 2.0 diesel unit, which ensures proper scaling of the measurement signal and correct communication with the vehicle's electronics. Using a sensor dedicated to a specific engine configuration translates into stable operating parameters, predictable reactions to load, and consistency with the factory control strategy. Thanks to this solution, the exhaust system maintains the appropriate flow and temperature characteristics, and the controller has access to reliable data necessary for precise management of the combustion process in the diesel engine.

Technical characteristics and product group

The sensor belongs to the Lambda sensors and O2 sensors group, which are components responsible for measuring exhaust composition and providing feedback to the engine control unit. This group includes components that are crucial for the proper operation of the fuel system and emission reduction systems, which is why their selection should be based on compliance with the manufacturer's factory specifications. The product comes from the Land Rover brand offer, which means maintaining the original operating characteristics and matching the factory wiring and electrical architecture of the vehicle. It belongs to the used parts segment, which allows for repair cost optimization while maintaining compatibility with the factory control system.

Practical benefits of installing a NOx sensor

Using the correct NOx sensor in a Land Rover Discovery Sport L550 translates into a number of practical operational benefits:

• stable diesel engine operation across the full load range,
• proper cooperation with the exhaust aftertreatment system,
• reduced risk of emission-related error messages,
• maintaining operating parameters close to factory settings. For the user, this means more predictable vehicle behavior, better throttle response, and a reduction in unplanned downtime related to exhaust system diagnostics.

Selection, diagnostics, and technical knowledge

When selecting a NOx sensor for a specific Discovery Sport L550 unit, it is worth paying attention to compliance with the vehicle's factory specifications and the history of the exhaust system's operation. Proper identification of the part based on vehicle data and reference numbers minimizes the risk of communication problems with the engine control unit and speeds up the installation process. If you want to deepen your knowledge about the feasibility of using used modules and sensors, how to select them by VIN/OEM, as well as practical aspects of installation and diagnostics, check out our guide: Used automotive electronics – ECU modules and second-hand sensors in practice. If you are planning a comprehensive repair or upgrade of the exhaust system area in your Land Rover and need other elements from the same group, such as control probes, exhaust gas composition sensors, or measurement elements in the exhaust stream, check out the available parts in the Land Rover Lambda sensors and O2 sensors category.