Land Rover Discovery Sport L550 Throttle Body Butterfly Valve G4D3-9F991-AA

The Land Rover Discovery Sport L550 Throttle Body G4D3-9F991-AA is an original component from the Throttle Bodies group, designed for precise control of the air supplied to the engine. This used Land Rover component allows for the preservation of the engine's factory operating parameters and stable acceleration characteristics.

Specifications and technical data

• SKU: LR073708
• Mark: Land Rover
• Condition: Used
• OEM Part Number: LR073708
• Substitutable numbers: G4D3-9F991-AA, G4D39F991AA, LR073708
• Part type: Throttle Body
• Category: Throttle Bodies

Technical Characteristics and Throttle Body Function

The throttle body in the Land Rover Discovery Sport L550 is responsible for regulating the airflow in the intake system, which directly affects the fuel dose, engine running smoothness, and throttle response. A properly selected, original component from this group ensures:

• stable idle speed,
• smooth transitions between loads,
• correct cooperation with the engine control electronics,
• maintenance of factory exhaust emission parameters.

Thanks to its OEM construction, the throttle body maintains the correct geometry of the air channels and the actuator's operating characteristics, which is crucial for proper engine control unit calibration.

Compatibility and Replacement Numbers

The model designated as Land Rover Discovery Sport L550 Throttle Body G4D3-9F991-AA belongs to a group of components for which dedicated OEM part numbers and interchangeable numbers are provided. The presence of reference numbers facilitates the selection of the correct component based on service documentation or catalog data, and also minimizes the risk of installing an unsuitable variant.

In practice, this means the possibility of precise matching of the throttle body to the specific engine configuration in the Discovery Sport L550, while maintaining full compatibility with the factory control unit software.

Benefits of Using an Original Land Rover Throttle Body

Using an original component from the Throttle Bodies category in the Land Rover Discovery Sport L550 translates into a number of practical operational benefits:

• maintaining predictable throttle response across the entire RPM range,
• correct cooperation with throttle position sensors and the engine control system,
• reduced risk of diagnostic errors related to incorrect throttle body signals,
• easier calibration and adaptation during servicing.

A used OEM component is a good choice when the priority is to maintain the vehicle's original specification while optimizing repair costs.

Condition, Verification, and Service Application

The offered throttle body is a used component, which means that before installation, a standard service procedure is recommended: mechanical inspection of the flap, seats, and connectors, as well as potential cleaning of the intake system. This type of component is particularly useful for:

• resolving issues with fluctuating idle speeds,
• diagnosing errors related to throttle body position,
• restoring correct vehicle dynamics after an intake system failure.

Thanks to its original construction, installation is performed in the place of the factory throttle body, using existing mounting points and electrical connectors.

Intake System Expansion in Land Rover Discovery Sport

If you are planning a comprehensive repair or modernization of the engine area in your Land Rover and need other components from the same group, such as additional throttle bodies, throttle control elements, or modules cooperating with the intake system, check the available parts in the Land Rover Throttle Bodies category.

For a better understanding of the relationship between throttle body operation and engine supply, it is worth familiarizing yourself with expert material on the fuel system, diagnostics, and component selection by OEM numbers – this is discussed in detail in the article Fuel System – Injectors, Pumps, and Fuel Tank: Maintenance and Repair, which helps to view the entire supply system holistically.