Land Rover Discovery Sport L550 Nox Oxygen Sensor 2.0 Diesel GH22-5J299-AC

Land Rover Discovery Sport L550 Nox Oxygen Sensor 2.0 Diesel is a precision exhaust system component responsible for monitoring nitrogen oxide levels in the diesel engine exhaust. Thanks to accurate measurement, the sensor supports the operation of the exhaust gas treatment system, which translates into stable engine performance and compliance with emission standards. This solution is dedicated to Land Rover vehicles, designed for reliability in everyday use.

Specifications and technical data

• SKU: GH22-5J299-AC
• Mark: Land Rover
• Condition: Used
• OEM Part Number: GH22-5J299-AC
• Substitutable numbers: GH22-5J299-AC, GH225J299AC
• Fuel type: Diesel
• Rim width: 5
• Category: Oxygen Sensors

Function and role of the NOX sensor in a diesel engine

The NOX sensor in the Discovery Sport L550 model works in direct conjunction with the diesel engine control system, providing the controller with information about the current nitrogen oxide content in the exhaust gases. Based on this data, the system can appropriately adjust the fuel dose, injection system operation, and exhaust gas treatment strategy, which helps maintain the correct engine performance characteristics.

This element belongs to the Lambda sensors and O2 sensors group, i.e., components responsible for measuring exhaust parameters. A properly functioning NOX sensor reduces the risk of the engine entering emergency mode, helps maintain stable performance, and supports optimal fuel consumption under road conditions.

Benefits of using an original Land Rover sensor

Using a dedicated NOX sensor in the Discovery Sport L550 ensures:

• Proper cooperation with vehicle electronics – operating parameters are matched to the engine control unit software.
• Stable measurement values, which facilitates diagnostics and reduces the occurrence of emission-related errors.
• Better control over the combustion process in the diesel engine, which promotes the maintenance of engine performance.

A used original element is a reasonable choice for users who expect technically correct operation while maintaining a favorable cost-to-functionality ratio. In the case of sensors from the Lambda sensors and O2 sensors group, selecting a component consistent with the factory specification is crucial for the correct operation of the exhaust system.

Selection, compatibility, and installation aspects

When selecting a NOX sensor for the Land Rover Discovery Sport L550, it is particularly important to verify compatibility with the specific 2.0 Diesel engine version and exhaust system configuration. It is recommended to compare catalog data with vehicle documentation or consult a mechanic specializing in the Land Rover brand to ensure full electrical and mechanical compatibility.

During installation, pay attention to:

• correct seating of the sensor in the exhaust system thread,
• careful installation of the electrical harness, without tension or twisting of the wires,
• maintaining the correct sequence of steps when disconnecting and connecting the electrical installation.

After replacing the NOX sensor, it is often recommended to perform an adaptation or clear errors in the engine controller so that the system correctly accounts for the new measurement values and restores full functionality of the emission control system.

Used electronics and sensors – how to approach the purchase

In the case of elements such as the NOX sensor, which operate in a demanding exhaust environment, it is important to take a conscious approach to purchasing a used component. It is worth paying attention to compliance with manufacturer markings, fuel type, and intended use for a specific vehicle generation. It is also good practice to verify the origin history of the part and the condition of the electrical connectors.

If you want to better understand how to safely select used modules and sensors, how to check hardware and software compatibility, and what to pay attention to during installation, check out the guide: Used automotive electronics – ECU modules and second-hand sensors.

Expansion of the exhaust measurement system in Land Rover

If you are planning a comprehensive repair or modernization of the exhaust system area in your Land Rover and need other elements from the same group, such as additional oxygen sensors, control probes, or exhaust measurement elements, check the available parts in the Land Rover Lambda sensors and O2 sensors category.