Audi A5 F5 45 TFSI Petrol Fuel Pump Tank Fuel Sender Unit 8W0919087AA

Audi A5 F5 45 TFSI Petrol Fuel Pump Tank Fuel Sender Unit is an original fuel system component designed for petrol engines in the Audi A5 F5 generation with the 45 TFSI unit. Using a factory-spec fuel pump and sender unit ensures stable fuel pressure, precise tank level readings, and full compatibility with the vehicle's electronics, resulting in reliable engine performance and accurate diagnostics.

Specifications and technical data

• SKU: 8W0919087AA
• 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 presented unit belongs to the Fuel pumps and level sensors category and is responsible for both pumping fuel from the tank and measuring its quantity. In a TFSI petrol engine, a properly functioning in-tank pump is crucial for maintaining adequate supply to the high-pressure part of the system, while the integrated float sends information about the current fuel level to the ECU and instrument cluster.

This component is dedicated to Audi petrol vehicles, ensuring compliance with factory operating parameters, ECU maps, and the car's electrical architecture.

Construction of the pump and sender unit

The fuel pump integrated with the sender unit forms a complete module mounted inside the tank. The housing contains:

• a pumping section responsible for delivering fuel to the engine fuel rail,
• a float working with the fuel level sensor,
• fuel and electrical connections tailored for installation in the Audi A5 F5,
• a basket design that stabilizes pump operation at various fuel levels.

This configuration reduces the risk of cavitation, improves supply stability during dynamic driving, and allows the engine control unit to precisely monitor the amount of fuel in the tank.

Benefits of using an original module

Using an original fuel pump and sender unit in an Audi A5 F5 45 TFSI offers a range of practical advantages:

• Factory electrical and hydraulic fitment – no need for modifications to wiring, hoses, or mounts.
• Proper cooperation with the engine management system, which reduces the risk of ECU error codes and starting issues.
• Stable supply pressure across the entire load range, essential for direct-injection petrol engines.
• Accurate fuel level readings on the instrument cluster, facilitating refueling planning and diagnostics.

The product comes from the used original parts segment, allowing you to combine factory specification compliance with a more cost-effective repair compared to new aftermarket replacements.

Application in service practice

The fuel pump and sender module is typically replaced when issues arise such as hard starting (hot or cold), power drops under high load, uneven engine operation at low fuel levels, or incorrect fuel gauge readings. Replacing the complete unit instead of individual components reduces diagnostic time and minimizes the risk of the fault recurring.

To better understand the role of this component in the entire fuel system, it is worth checking out the guide describing the construction and maintenance of the fuel system – a detailed discussion can be found in the article Fuel system – injectors, pumps, and fuel tank: maintenance and regeneration.

Compatibility and part selection

When selecting a fuel pump and sender unit for an Audi A5 F5 45 TFSI with a petrol engine, pay attention to compatibility with the specific body version, model year, and engine configuration. Proper selection based on the OEM number or the vehicle's VIN allows you to avoid installation problems and ensures correct operation with the electrical system and engine ECU.

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