Audi A3 8P Fuel Pump Sender Tank Sending Unit 2.0 TFSI 1K0919051AJ

Audi A3 8P Fuel Pump Sender Tank Sending Unit 2.0 TFSI is an original component from the Fuel pumps and level sensors group, designed for the fuel supply system of a gasoline engine. The pump assembly with the float is responsible for both stable fuel delivery and precise fuel level readings, which directly impacts driving comfort and operational safety.

Specifications and technical data

• SKU: 1K0919051AS
• Mark: Audi
• Condition: Used
• OEM Part Number: 1K0919051AS
• Substitutable numbers: 1K0919051AS, 1K0 919 051 AS, 1K0919051AJ, 1K0 919 051 AJ
• Fuel type: Petrol
• Part type: Fuel Sending Unit
• Category: Fuel Pumps & Sending Units

Purpose and function in the fuel system

The presented pump assembly with a level sensor is designed to work with the 2.0 TFSI gasoline engine in the Audi A3 8P model. This component is responsible for maintaining the correct fuel pressure in the supply system and transmitting fuel level information to the instrument cluster, allowing the driver to monitor range and plan refueling.

Combining the pump and float into a single module reduces the number of connections in the tank, which lowers the risk of leaks and simplifies maintenance. Using a dedicated solution for the gasoline unit ensures compatibility with the fuel injection system's characteristics, including performance and stability requirements under varying engine loads.

Construction of the pump and float assembly

The fuel pump module integrated with the float creates a compact design mounted directly inside the fuel tank. The assembly includes, among others:

• a pump section responsible for delivering fuel to the supply system,
• a float working with the fuel level sensor,
• a mounting housing adapted to the geometry of the Audi A3 8P tank,
• a set of fuel and electrical connections allowing for integration with the vehicle's wiring.

This configuration allows for efficient installation and removal during service, as well as maintaining the factory performance of the fuel gauge on the dashboard. The original Audi design promotes proper positioning of the float, which reduces fuel level reading errors under various driving conditions.

Operating parameters and compatibility with the gasoline system

The pump is adapted for use in a gasoline fuel supply system, meaning it has appropriate material resistance to the composition and additives used in fuels, as well as compliance with the system's pressure requirements. Properly selected flow parameters and pump performance characteristics are crucial for the stable operation of the 2.0 TFSI unit, especially during dynamic acceleration and high loads.

Using a dedicated pump and float module reduces the risk of issues such as fuel pressure drops, uneven engine operation, or incorrect fuel level readings. As a result, the fuel system retains its factory properties, and the diagnosis of potential faults is simpler and more predictable.

Condition, installation, and service application

The item is offered as a used part, which is a cost-effective solution while maintaining the manufacturer's original specifications. This type of component is often chosen for fuel system repairs when it is necessary to replace the complete pump module with a level sensor, and the priority is to maintain compatibility with the factory Audi solution.

In service practice, the pump assembly with the float is used, among other things, for:

• starting problems or engine stalling caused by insufficient fuel supply,
• incorrect fuel level readings on the instrument cluster,
• modernization or comprehensive maintenance of the fuel system in an Audi A3 8P with a gasoline engine.

Technical support and part selection

The fuel pump module with a float should always be selected taking into account the manufacturer's markings and the vehicle's engine version. Proper selection for the 2.0 TFSI unit and fuel type minimizes the risk of mechanical and electrical compatibility issues. In case of doubt, it is worth consulting service documentation or the technical department.

To better understand the principles of the fuel supply system, the diagnostic process, and the importance of correctly selecting the pump and level sensor, the guide article Fuel system – injectors, pumps, and fuel tank: maintenance and regeneration will be helpful, where, among other things, part selection by number and typical symptoms of faults are discussed.

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