Land Rover Range Rover Sport L320 Fuel Injector 276DT Diesel 4H2Q-9K546-AE

Land Rover Range Rover Sport L320 Fuel Injector 276DT Diesel is a precision fuel system component designed for diesel engines in the popular 276DT unit. It is responsible for accurate fuel metering under high pressure, which translates into stable engine operation, smooth running, and exhaust emission control. As an item from the Fuel injector nozzles category, it is a key component for the professional repair or regeneration of the fuel injection system in the Range Rover Sport L320.

Specifications and technical data

• SKU: 4H2Q-9K546-AE
• Mark: Land Rover
• Condition: Used
• OEM Part Number: 4H2Q-9K546-AE
• Substitutable numbers: 4H2Q-9K546-AE, 4H2Q9K546AE, LR006495, 4H2Q9K546AF, 4H2 Q9K 546 AF
• Fuel type: Diesel
• Part type: Fuel Injector
• Category: Fuel Injectors

Purpose and role in the injection system

The fuel injector in the 276DT engine is responsible for forming a precise dose of diesel fuel and atomizing it in the combustion chamber. A properly functioning injector nozzle ensures:

• stable injection pressure across the entire RPM range,
• even operation of all cylinders,
• reduction of smoke and power loss,
• more predictable fuel consumption.

Selecting the correct injector for the 276DT unit is particularly important in Range Rover class vehicles, where the powertrain operates under high load, often in varied road conditions.

Benefits of using a dedicated injector nozzle

A properly selected element from the Fuel injector nozzles category allows for maintaining the factory performance parameters of the power unit. In practice, this means:

• better throttle response and smoother acceleration,
• reduced tendency to jerk at low RPM,
• more even idling,
• lower risk of secondary damage to the fuel and exhaust systems.

In the case of diesel engines, every injector operates in a very demanding environment, which is why using a component designed for the specific 276DT unit has a direct impact on the durability of the entire system.

Technical characteristics and fitment

The presented fuel injector is designed for use with Diesel fuel, which guarantees compatibility with the factory configuration of the 276DT unit in the Range Rover Sport L320. The element has been designed as part of a common rail system, where the following are crucial:

• precise control of nozzle opening time,
• resistance to high operating pressures,
• stable fuel atomization parameters over a long service life.

Thanks to maintaining the correct design parameters, the injector works with the engine's factory control electronics, which facilitates diagnostics and adaptation after installation.

Product condition and service application

The offered fuel injector is a used item, making it an attractive solution for repairs where cost-effectiveness is a priority. This type of component is suitable both for replacing a single faulty injector and for the staged rebuilding of the entire fuel injection system in a Land Rover Range Rover Sport L320 with a 276DT engine.

Before installation, standard workshop procedures are recommended: verifying the fuel system for contaminants, checking parameters on a diagnostic bench, and properly bleeding the system after installation. This approach minimizes the risk of recurring faults and allows you to fully utilize the potential of the installed injector.

Diagnostics and technical knowledge

Malfunctioning fuel injectors in a diesel engine can cause a range of symptoms – from starting difficulties and power loss to increased fuel consumption and smoke. To better understand the symptoms and verification methods, it is worth consulting a specialized guide: Diesel injector faults – how to recognize them and the risks of neglecting them. This is a practical source of knowledge that facilitates the decision-making process regarding replacement or further diagnostics of fuel injection system components.

Range Rover fuel injector nozzles – expansion and system modernization

If you are planning a comprehensive repair or modernization of the engine area in your Range Rover and need other items from the same group, such as additional injectors, spray tips, or components accompanying the injection assembly, check the available parts in the Range Rover fuel injector nozzles category.