Land Rover Freelander 2 2.2 Diesel Lambda Sensor Oxygen Probe 7G91-9D375-AA

The Land Rover Freelander 2 2.2 Diesel Lambda Sensor is a specialized exhaust gas sensor designed for diesel engines, supporting precise fuel injection and injection system control. A correctly selected lambda sensor in a Diesel engine helps maintain stable engine operating parameters, reduce fuel consumption, and ensure the efficiency of the exhaust gas purification system. This solution is for users seeking a proven component from the Lambda Sensors and O2 Sensors group.

Specifications and technical data

• SKU: 7G91-9D375-AA
• Mark: Range Rover
• Condition: Used
• OEM Part Number: 7G91-9D375-AA
• Substitutable numbers: 7G91-9D375-AA, 7G919D375AA, LR001370
• Fuel type: Diesel
• Category: Oxygen Sensors

Purpose and Role in the Diesel Fuel System

The lambda sensor in a 2.2 Diesel engine is responsible for monitoring oxygen content in the exhaust gases and transmitting a signal to the engine control unit (ECU). Based on this signal, the ECU adjusts the fuel dose, injection timing, and injection system strategy, which translates to:

• stable engine operation across the full load range,
• more uniform mixture combustion,
• reduced smoke and improved engine running smoothness,
• support for the proper functioning of the diesel particulate filter and other exhaust system components.

For owners of Range Rover and Land Rover models, using the correct O2 sensor is crucial to maintain factory engine operating parameters and avoid diagnostic errors related to the mixture and exhaust emissions.

Benefits of Using a Dedicated Lambda Sensor

Selecting a lambda sensor designed for a specific 2.2 Diesel variant ensures the correct signal characteristics and electrical compatibility with the factory control unit. In practice, this means:

• proper cooperation with the ECU software without the need for adaptation,
• consistency with factory injection maps and exhaust system regeneration strategies,
• reduced risk of errors related to the mixture and O2 sensor,
• maintaining exhaust emission parameters at the level intended for the specific model.

For diesel engines, the stability of the sensor reading is particularly important, as it affects the fuel dose, exhaust gas temperature, and the load on components such as the turbocharger or diesel particulate filter.

Product Characteristics and Condition

The presented lambda sensor comes from the Lambda Sensors and O2 Sensors group, dedicated to Range Rover vehicles. The item is marked as used, which means it has been removed from a vehicle and is intended for reinstallation after the buyer has verified its condition. Such components are often chosen by users looking for a reasonable compromise between repair costs and maintaining the vehicle's original specifications.

The use of a used lambda sensor is particularly significant for older vehicles where maintaining powertrain efficiency at controlled service costs is a priority. A correctly selected O2 sensor allows for the restoration of correct engine operating parameters without interfering with the electrical system or control unit software.

Selection, Compatibility, and Technical Support

To ensure that the selected Land Rover Freelander 2 2.2 Diesel Lambda Sensor will work correctly with your vehicle, it is advisable to verify compatibility by OEM number, interchangeable part numbers, or based on catalog data for the specific engine version. When selecting a sensor for diesel engines, important factors include fuel type, exhaust system configuration, and the engine control unit used.

If you want to deepen your knowledge on the advisability of using used sensors and control modules, methods for verifying compatibility, and selection by OEM numbers and hardware parameters, consult the guide: Used Automotive Electronics – Second-Hand ECUs and Sensors. You will find practical tips there that will facilitate an informed choice, including for lambda sensors.

Expanding the Exhaust Measurement System in Range Rover

If you are planning a comprehensive repair or upgrade of the exhaust system and emissions control area in your Range Rover and need other parts from the same group, such as additional O2 sensors, pre- and post-catalyst sensors, or exhaust gas composition monitoring components, check the available parts in the Range Rover Lambda Sensors and O2 Sensors category.

This allows you to ensure the consistency of the entire measurement system in a single service stage, which reduces the risk of exhaust emission-related errors recurring and simplifies subsequent diagnostics.