Land Rover Discovery 4 L319 EGR Valve 306DT 3.0 Diesel 9H2Q-6C860-DF

Land Rover Discovery 4 L319 EGR Valve 306DT 3.0 Diesel is a component from the EGR valves and parts category, designed for the exhaust gas recirculation system in the 3.0 diesel engine. It enables the maintenance of stable engine operating parameters, supporting smooth performance, fuel economy, and exhaust emission control in your Discovery 4.

Specifications and technical data

• SKU: 9H2Q-6C860-DF
• Mark: Land Rover
• Condition: Used
• OEM Part Number: 9H2Q-6C860-DF
• Substitutable numbers: 9H2Q-6C860-DF, 9H2Q6C860DF, LR043939
• Fuel type: Diesel
• Category: EGR Parts & Valves

Purpose and function in the EGR system

The presented EGR valve is dedicated to the 306DT 3.0 Diesel engine in the Land Rover Discovery 4 L319 model. It is responsible for precise control of the exhaust gas flow returned to the intake manifold, which allows for reducing nitrogen oxide emissions, stabilizing combustion temperature, and improving engine operating conditions across a wide range of loads.

A well-chosen valve from this group ensures:

• proper exhaust gas recirculation under typical road conditions,
• smoother engine operation at low and medium RPMs,
• better compatibility with the factory engine control unit and emission sensors.

Benefits of using an original Land Rover component

Using an EGR valve from the Land Rover range allows you to maintain the factory performance characteristics of the 3.0 Diesel engine. The original channel geometry, properly selected cross-sections, and correct actuator operating parameters translate into predictable engine response and proper cooperation with the control system.

In practice, this means:

• maintaining the exhaust emission values designed by the manufacturer,
• reducing the risk of errors related to the EGR system,
• consistency with other components of the intake and exhaust system.

Product characteristics and condition

The offered item comes from the EGR valves and parts category and is intended for a diesel engine. The product is in used condition, which allows for an economical replacement of a damaged or worn valve while maintaining proper functionality. This is a particularly beneficial solution for maintenance repairs where a reasonable balance between cost and performance is important.

Before installation, it is recommended to perform a standard verification of the intake and exhaust system to ensure proper operating conditions for the EGR valve and to avoid secondary failures resulting from contamination or leaks.

Integration with the 3.0 Diesel engine system

The EGR valve for the 306DT 3.0 Diesel unit has been designed to work with the factory engine control unit and exhaust temperature and composition sensors. This makes it possible to maintain stable injection maps, proper turbocharger operation, and appropriate response to load changes. A properly functioning EGR valve also supports even engine warm-up and reduces excessive smoke during acceleration.

Expanding the EGR system in Land Rover Discovery 4

If you are planning a comprehensive repair or upgrade of the engine area in your Land Rover and need other elements from the same group, such as additional valves, hoses, or control components, check out the available parts in the Land Rover EGR valves and parts category.

Technical support and tuning with used parts

For users who are thinking about improving the performance of the 3.0 Diesel unit or planning broader modifications, a practical guide on using used components in powertrain modifications may be useful. Detailed tips can be found in the article How to increase engine power: a practical guide to engine tuning with used parts, which discusses step-by-step how to safely approach such changes.

If you are considering a larger project based on second-hand parts and want to avoid common pitfalls when selecting them, it is also worth reading the material Buying used car parts • Most common mistakes when choosing parts for tuning, which helps you plan your purchases consciously and reduce the risk of poor decisions.