Audi A8 S8 D3 Fuel Tank Sender Pump Flange Lid Cover Cap Left N/S 3D0919679

The Audi A8 S8 D3 Fuel Pump Flange Left is an original part from the Fuel Pumps and Level Sensors group, designed for left-side installation in Audi's premium models. This precisely fitted flange-cap ensures a sealed closure of the fuel module, stable mounting of accessories, and safe operation of the fuel system. It's a solution dedicated to users who expect factory compatibility and predictable installation.

Specifications and technical data

• SKU: 4E0919679
• Mark: Audi
• Condition: Used
• OEM Part Number: 4E0919679
• Substitutable numbers: 4E0919679, 4E0 919 679, 3D0919679, 3D0 919 679
• Location on the vehicle: Left
• Part type: Fuel Sending Unit
• Category: Fuel Pumps & Sending Units

Purpose and Function in the Fuel System

The left-side fuel pump flange-cap is responsible for the mechanical sealing of the upper part of the fuel module and the correct routing of lines and connectors. In Audi A8/S8 D3 vehicles, this component works with the pump basket, fuel level sensor, and fuel system, contributing to:

• maintaining the tank's seal in the fuel module area,
• stable seating of the pump and level sensor,
• safe routing of fuel and electrical lines,
• reducing the risk of leaks and incorrect fuel level readings.

Thanks to its dedicated fit for the A8/S8 D3 platform, the flange maintains the correct geometry and integrates with the factory fuel tank without requiring modifications.

Construction and Mounting Fit

The part is designed as a precision mounting flange integrated with a cap that seals the service opening of the fuel module on the left side of the vehicle. The construction includes appropriate sockets for connectors, grommets, and mounting points, facilitating the correct arrangement of lines and connectors.

Its placement on the left side of the vehicle is important for part selection – many fuel tanks use separate modules or covers for the left and right sides, so correctly identifying the installation side is crucial for the proper functioning of the entire system.

Benefits of Using an Original Audi Flange

Using an original flange-cap in the Audi A8/S8 D3 allows for the fuel system's operating parameters to remain consistent with the manufacturer's specifications. In practice, this means:

• secure fit with the factory tank and pump module,
• minimized risk of leaks around the cover,
• correct routing of fuel and electrical lines,
• easier diagnostics and future servicing due to the preservation of the original system architecture.

This solution is particularly beneficial for repairs after intervention in the fuel tank, pump or level sensor replacement, as well as for restoring the car to a configuration close to its original state.

Condition, Verification, and Part Selection

The offered flange-cap is a used part, allowing for economical repair while maintaining original Audi specifications. Before installation, a standard visual inspection for seals, connector sockets, and mating surfaces with the tank is recommended.

When selecting a part for your A8 or S8 D3, pay attention to:

• compatibility with the body version and model generation,
• placement on the vehicle (left side),
• association with the installed fuel pump module and level sensor.

For users who wish to deepen their knowledge of fuel system diagnostics and operation, the article: Fuel System – Injectors, Pumps, and Fuel Tank: Maintenance and Repair will be helpful.

Audi Fuel System Expansion and Servicing

If you are planning a comprehensive repair or upgrade of the fuel system area in your Audi and need other parts from the same group, such as pump modules, level sensors, or additional mounting components, check the available parts in the Audi Fuel Pumps and Level Sensors category.

If you are interested in the broader use of second-hand components in cars of this brand – for both repairs and modifications – it is worth reading the guide: Audi on Second-Hand Parts – Tuning and Repairs Without Quality Loss, which discusses a practical approach to selecting used components.