Range Rover L405 Exhaust Gas Temperature Sensor 4.4 SDV8 8H22-12B591-AB

The Range Rover L405 Exhaust Gas Temperature Sensor 4.4 SDV8 is a component from the Lambda Sensors and O2 Sensors category, designed for precise monitoring of exhaust gas temperature in the 4.4 SDV8 unit. A properly functioning sensor supports stable exhaust system operation, correct fuel injection control, and emissions control, which translates to safe and predictable vehicle operation.

Specifications and technical data

• SKU: 8H22-12B591-AB
• Mark: Range Rover
• Condition: Used
• OEM Part Number: 8H22-12B591-AB
• Substitutable numbers: WDN500130, 8H2212B591AB, 8H22-12B591-AB
• Category: Oxygen Sensors

Purpose and Function of the Exhaust Gas Temperature Sensor

The exhaust gas temperature sensor in the 4.4 SDV8 engine is responsible for continuously measuring the gas temperature in the exhaust system and transmitting this data to the engine control unit. Based on the sensor's signal, the control unit can:

• optimize fuel injection quantity and timing,
• control the operation of emission reduction components,
• protect exhaust system components from overheating.

A functional exhaust gas temperature sensor is particularly important in powerful diesel engines, such as the 4.4 SDV8, where thermal loads are high and the engine control system requires reliable measurement data.

Why Choose an Original Range Rover Sensor

An original exhaust gas temperature sensor dedicated to the Range Rover L405 ensures proper fitment with the vehicle's electrical system and exhaust system. This allows for:

• compatibility with the factory engine control unit software,
• reduced risk of diagnostic errors and warning lights,
• maintained stable engine operation across the full load range.

Choosing an original part from the Lambda Sensors and O2 Sensors category helps avoid problems typical of aftermarket replacements with uncertain parameters, such as unstable signals, incorrect measurement ranges, or shorter operational lifespan.

Used Condition – A Conscious Technical Choice

The presented exhaust gas temperature sensor is a used component, offering a sensible compromise between cost and functionality. In practice, this means the possibility of restoring proper exhaust system operation without the need to invest in a new component, while maintaining the original manufacturer's specifications.

A used exhaust gas temperature sensor can be a particularly attractive solution for:

• repairs of vehicles used intensively,
• servicing of fleet vehicles,
• restoring vehicle functionality after an exhaust system failure.

Selection by OEM Number and Interchangeable Numbers – How to Avoid Mistakes

To ensure the sensor is suitable for a specific configuration of the Range Rover L405 with a 4.4 SDV8 engine, matching by OEM number and available interchangeable numbers is crucial. Verifying compatibility using these designations minimizes the risk of installing an incorrect part that could cause control unit errors or inaccurate temperature readings.

If you need a more detailed discussion on selecting used modules and sensors, practical tips on compatibility, and interpreting markings, we recommend reading the guide: Used Automotive Electronics – How to Safely Choose Second-Hand ECU Modules and Sensors. You will find information there that is also helpful when purchasing exhaust gas temperature sensors.

System Expansion – Other Range Rover Lambda Sensors and O2 Sensors

If you plan to replace more components from the same group during servicing, it's worth considering selecting other Range Rover Lambda Sensors and O2 Sensors. This will facilitate comprehensive exhaust system maintenance and help reduce service downtime. Check the available Range Rover Lambda Sensors and O2 Sensors to select a complete solution tailored to your vehicle.

Summary

The Range Rover L405 Exhaust Gas Temperature Sensor 4.4 SDV8 is an original component from the O2 sensors and probes category, designed for precise exhaust gas temperature monitoring in a powerful diesel engine. Using the correct sensor supports proper engine control unit operation, stable performance parameters, and emissions control, which directly impacts exhaust system durability and vehicle comfort.