Audi S3 8V Diesel Fuel Pump Tank Sender Control Unit 5Q0919673J

Audi S3 8V Diesel Fuel Pump Tank Sender Control Unit is an original fuel system component designed for precise control of the in-tank fuel pump operation and fuel level readings in vehicles of this series. Thanks to its factory design, it ensures stable fuel pressure, proper cooperation with the vehicle's electronics, and reliable readings on the instrument cluster. This is a practical solution for users who want to restore the correct operation of the fuel system in their Audi with a diesel engine.

Specifications and technical data

• SKU: 5Q0919673J
• Mark: Audi
• Condition: Used
• OEM Part Number: 5Q0919673J
• Substitutable numbers: 5Q0919673J, 5Q0 919 673 J
• Fuel type: Diesel
• Category: Fuel Pumps & Sending Units

Function in the Audi S3 8V fuel system

The presented control unit is responsible for controlling the operation of the in-tank fuel pump and managing the fuel level sensor in diesel engine versions. In practice, this means:

• regulating pump performance depending on engine load and fuel demand,
• ensuring proper power supply to the engine unit during startup and while driving,
• processing the signal from the fuel level sensor and transmitting it to the instrument cluster,
• cooperating with the vehicle's diagnostic systems regarding fuel system errors.

As a result, the fuel system in the Audi S3 8V with a diesel engine operates in a predictable manner, and the driver receives clear information about the amount of fuel in the tank.

Application and vehicle fitment

The element belongs to the Fuel pumps and level sensors group, which are components responsible for transporting fuel from the tank to the engine and monitoring its quantity. As a part designed for Audi, the control unit is structurally matched to the electrical and communication architecture of this manufacturer, which facilitates integration with the factory engine control system.

Before installation, it is worth verifying compatibility by OEM number or interchangeable numbers based on service documentation or a parts catalog to ensure proper fitment for the specific equipment version and vehicle model year.

Characteristics of the used component

The offered control unit comes from the secondary market, which means it is a used part. Such components are often chosen for fuel system repairs because they allow for maintaining factory specifications while reducing costs compared to new subassemblies. In the case of fuel system control units, it is particularly important to preserve the original electronics, which were designed to work with a specific vehicle platform.

During installation, standard workshop procedures are recommended: checking the wiring harness, connectors, grounds, and potentially clearing errors in the engine control unit after replacement so that the system can correctly adapt the new module.

Benefits of using an original pump control unit and level sensor

Choosing an original Audi S3 8V Diesel Fuel Pump Tank Sender Control Unit brings a number of practical benefits:

• Compatibility with vehicle electronics – full compliance with the communication bus and engine control unit software.
• Stable fuel pump operation – proper control of pump performance and operating time under various load conditions.
• Correct fuel level readings – reducing the risk of erroneous readings on the dashboard.
• Computer diagnostics capability – support for standard diagnostic procedures at a service center or workshop.

Thanks to this, installing such an element allows for restoring the consistent operation of the entire fuel system, which has a direct impact on the comfort of use and the safety of vehicle operation.

Related components and technical knowledge

If you are planning a comprehensive repair or upgrade of the fuel system area in your Audi and need other elements from the same group, such as pump control modules, in-tank pump assemblies, or fuel level sensors, check the available parts in the Audi fuel pumps and level sensors category.

To better understand the relationships between the pump, control unit, and fuel level sensor and to consciously select components by OEM or VIN number, it is worth using a technical guide. A detailed discussion of fuel system operation, diagnostics, and regeneration can be found in the article "Fuel system – injectors, pumps, and fuel tank: maintenance and regeneration", which contains practical tables and answers to frequently asked questions.