Land Rover Discovery 4 L319 Lambda Oxygen Sensor Nox 3.0 Diesel GH22-9D375-AB

Land Rover Discovery 4 L319 Lambda Oxygen Sensor Nox 3.0 Diesel is a specialized exhaust system component responsible for the precise measurement of exhaust gas composition in a diesel engine. By accurately monitoring nitrogen oxide levels, it supports the proper operation of the exhaust gas treatment system, stable performance of the 3.0 Diesel unit, and compliance with emission standards. This solution is designed for users looking for an efficient, technically verified component tailored to the specifics of Land Rover models.

Specifications and technical data

• SKU: GH22-9D375-AB
• Mark: Land Rover
• Condition: Used
• OEM Part Number: GH22-9D375-AB
• Substitutable numbers: GH22-9D375-AB, GH229D375AB, LR071710
• Fuel type: Diesel
• Category: Oxygen Sensors

Function of the NOx sensor in the exhaust system

The NOx sensor in the Land Rover Discovery 4 L319 operates within the exhaust gas stream, measuring nitrogen oxide and oxygen content, which allows the engine control unit to continuously adjust the fuel dose and the exhaust treatment strategy. A properly functioning sensor translates into:

• stable operation of the 3.0 Diesel engine across the full load range,
• reduction of smoke and power loss during dynamic acceleration,
• maintenance of the efficiency of the NOx emission reduction system,
• reduced risk of the engine entering limp mode.

For modern diesel units, a functional NOx sensor is crucial for both performance and the durability of other exhaust system components.

Purpose and compatibility

The presented sensor belongs to the Lambda sensors and O2 sensors group, dedicated to use in Land Rover vehicles with a Diesel engine. Its design and operating characteristics are adapted to the requirements of the engine control unit used in the Discovery 4 L319, enabling proper communication with the vehicle's electronics and correct signal interpretation by the control system.

The item has an assigned OEM part number and associated interchangeable numbers, which facilitates the selection of the correct component according to the manufacturer's catalog or VIN. This allows for precise verification of compatibility with a specific vehicle configuration, minimizing the risk of installing an incorrect sensor.

Operational characteristics and installation

As an item from the lambda and O2 sensor category, this NOx sensor is adapted to work in the demanding environment of high temperatures and variable exhaust gas composition typical of diesel units. In practice, this means:

• a stable measurement signal across a wide range of operating temperatures,
• resistance to typical operational loads in Diesel engines,
• compatibility with the factory wiring harness and engine control unit.

When replacing, it is recommended to follow proper installation procedures (correct tightening torque, thread inspection in the socket, wiring verification) to ensure exhaust system tightness and uninterrupted signal transmission to the controller.

Product condition and benefits of choosing a used sensor

The offered NOx sensor is in used condition, which provides an attractive cost-effective solution while maintaining the functionality required by the engine control system. For many Land Rover Discovery 4 L319 users, choosing a verified second-hand component allows for reduced expenses while maintaining the proper operation of the powertrain.

If you want to better understand how to safely select and operate used modules and sensors in modern cars, check out the Global Parts guide: Used automotive electronics on board – why is it worth choosing second-hand ECU modules and sensors?. You will find practical tips on selection by OEM numbers, compatibility, and installation there.

Expansion of the exhaust measurement system in Land Rover

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 additional probes, oxygen sensors, or NOx sensors, check out the available parts in the Land Rover Lambda sensors and O2 sensors category.

For users interested in the wider use of second-hand components in modernization projects or improving vehicle performance, the following article may also be an inspiration: The best used parts for tuning your car, which discusses a practical approach to selecting second-hand parts.