Range Rover L405 4.4 SDV8 448DT Diesel Fuel Injector AH4Q-9K546-BA

Range Rover L405 4.4 SDV8 448DT Fuel Injector AH4Q-9K546-BA is an original injector nozzle designed for the 4.4 SDV8 diesel engine used in luxury Range Rover L405 models. This component ensures precise fuel delivery, stable engine operation, and proper combustion parameters under demanding operating conditions.

Specifications and technical data

• SKU: AH4Q-9K546-BA
• Mark: Range Rover
• Condition: Used
• OEM Part Number: AH4Q-9K546-BA
• Substitutable numbers: LR054298, LR054296, AH4Q9K546BA, AH4Q-9K546-BA, 0445116037, 0 445 116 037
• Fuel type: Diesel
• Part type: Fuel Injector
• Category: Fuel Injectors

Purpose and Technical Characteristics

The presented fuel injector belongs to the category of injector nozzles and is dedicated to the diesel engine in the Range Rover L405 with the 4.4 SDV8 448DT unit. The injector's design has been developed for high operating pressure and precise atomization of diesel fuel in the combustion chamber, which translates to smooth engine operation and correct torque characteristics.

The component works with a common rail injection system, where accurate fuel metering at short intervals is crucial. This allows for maintaining the proper refinement of the V8 unit, reducing vibrations, and improving response to load.

Benefits of Using an Original Injector Nozzle

Using an original injector in the 4.4 SDV8 engine brings a number of tangible operational benefits:

• Stable Engine Operation – proper fuel atomization promotes even combustion in each cylinder.
• Improved Dynamics – correct diesel fuel metering supports achieving the full power and torque of the 448DT unit.
• Reduced Smoke – precise injection helps reduce excessive exhaust emissions and visible smoke from the exhaust system.
• Component Protection – correct injector operation reduces the risk of excessive load on pistons, valves, and the turbocharger.
• Better Refinement – proper fuel doses contribute to reducing uneven idling and jerking during acceleration.

Condition, Verification, and Practical Application

The offered injector is used, which is a cost-effective solution while maintaining compliance with the factory specification of the Range Rover. Such components are often chosen for professional repairs when matching a specific engine version and preserving the original operating parameters of the injection system is important.

Before installation, it is recommended to perform standard workshop procedures, such as leak testing, checking the injection rate on a test bench, and verifying the injector's correct operation within the operating pressure ranges specified for the 4.4 SDV8 unit. A correctly selected and functional component helps avoid common problems such as difficulty starting with a warm engine, power loss, or increased fuel consumption.

Diagnostics and Prevention for the Injection System

If you suspect incorrect injector operation in a diesel engine, pay attention to symptoms such as uneven idling, knocking under load, excessive smoke, or engine control unit errors. These are discussed in detail in the article: Diesel Injector Failures – How to Recognize Them and What Neglecting Them Entails, which provides practical knowledge for selecting and replacing injector nozzles.

Selection and Compatibility with Range Rover L405

To ensure the presented injector is suitable for your specific Range Rover L405 configuration, it is recommended to verify compatibility by OEM number and interchangeable numbers, as well as by the vehicle's VIN. This selection method minimizes the risk of installing an incorrect part and facilitates subsequent fuel system diagnostics.

If you want to streamline the process of searching for parts by catalog and VIN numbers, the guide: How to Select the Correct Car Part by VIN and OEM Number, which describes practical methods for verifying the compatibility of used parts step-by-step, may be helpful.

If you need other Range Rover injector nozzles for your vehicle, check the Range Rover injector nozzles available in our store to select parts that match your specific engine version and car year.