Audi S4 B9 3.0 TFSI CWGD Petrol Engine Fuel Pump Tank Sender Unit 8W0919087AA

Audi S4 B9 3.0 TFSI CWGD Petrol Engine Fuel Pump Tank Sender Unit is an original fuel system component designed for precise operation with the CWGD engine. Thanks to Audi's factory design and the use of proven technology for petrol engines, the component ensures a stable fuel supply to the power unit and accurate fuel level readings in the tank.

Specifications and technical data

• SKU: 8W0919087AA-1
• Mark: Audi
• Condition: Used
• OEM Part Number: 8W0919087AA
• Substitutable numbers: 8W0919087AA, 8W0 919 087 AA
• Fuel type: Petrol
• Category: Fuel Pumps & Sending Units

Purpose and function in the fuel system

The described fuel pump and level sensor assembly operates directly within the fuel tank, responsible for continuously delivering petrol at the correct pressure to the fuel injection system of the 3.0 TFSI CWGD engine. Simultaneously, the integrated float-type level sensor transmits information about the fuel quantity to the instrument cluster, allowing for safe vehicle operation and refueling planning.

The "tank sender unit" solution reduces the number of connections and potential leaks by combining the pump and measurement module functions into a single housing. As a result, the fuel system remains more compact, and diagnostics and maintenance are simplified.

Benefits of using an original Audi component

Using a factory fuel pump and level sensor assembly in an Audi S4 B9 allows you to maintain the operating parameters specified by the vehicle manufacturer. The original design ensures:

• adequate performance for the 3.0 TFSI unit across the full load range,
• proper fitment to the fuel tank geometry,
• correct compatibility with the electrical system and engine control unit,
• consistency of fuel level readings with the factory instrument cluster.

This item from the Fuel pumps and level sensors category in its used version is an attractive cost-effective alternative to a new component, while maintaining the original Audi design specifications.

Condition, verification, and service application

The product is offered as used, which in workshop practice means the possibility of an economical repair of the fuel system while retaining an OEM component. This type of solution is particularly beneficial in cases of:

• electrical failure of the in-tank fuel pump,
• incorrect fuel level readings on the dashboard,
• the need to replace the complete module instead of regenerating individual elements.

Before installation, it is recommended to perform a standard check of the connector tightness, the condition of electrical terminals, and the cleanliness of the pump housing to ensure stable operation in the petrol system and reduce the risk of further service intervention.

Technical support and selection of used components

When selecting used fuel system and electronic components, it is worth following the vehicle's factory specifications and workshop best practices. If you want to better understand when installing used components is a reasonable solution, how to assess their suitability, and what to look for when purchasing, check out our guide: Second life of electronics – when is it worth choosing used engine ECUs, comfort modules, and parking sensors?

Related Audi fuel system components

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