Audi A3 8Y A4 B9 Diesel High Pressure Fuel Pump 2.0 TDI DTNB 05L130755

Audi A3 8Y A4 B9 Diesel High Pressure Fuel Pump 2.0 TDI DTNB is an original fuel system component designed for Audi diesel engines. As part of the High-pressure fuel pumps category, it ensures precise diesel fuel delivery to the fuel rail, which translates into stable engine operation and correct combustion parameters. This is a solution for users who expect a proven design and compliance with Audi's factory standards.

Specifications and technical data

• SKU: 05L130755-1
• Mark: Audi
• Condition: Used
• OEM Part Number: 05L130755
• Substitutable numbers: 05L130755, 05L 130 755, 0 445 010 790, 0445010790
• Fuel type: Diesel
• Category: High Pressure Fuel Pumps

Purpose and role in the fuel system

The presented high-pressure pump is a component of the common rail system in a Diesel engine, responsible for generating sufficiently high fuel pressure for the injectors. A properly selected pump helps maintain:

• stable pressure in the fuel rail across the full load range,
• correct fuel doses during start-up and dynamic acceleration,
• consistent engine operating parameters with the engine control unit maps.

By maintaining factory operating characteristics, the pump supports proper engine refinement, reduces the risk of jerking, and facilitates the diagnosis of potential faults in the fuel supply system.

Benefits of using an original Audi pump

Choosing a high-pressure pump dedicated to the Audi A3 8Y and A4 B9 allows you to maintain consistency with the vehicle's factory configuration. The original design ensures:

• compatibility with engine control unit parameters and factory software,
• appropriate pressure characteristics across the entire RPM range,
• proper cooperation with injectors and other fuel system components.

For the user, this means more predictable vehicle behavior, easier calibration during diagnostics, and a lower risk of problems resulting from improperly selected replacements. Original Audi origin also helps maintain the vehicle's value and compliance with the manufacturer's recommendations.

Technical characteristics and compatibility

The pump belongs to the High-pressure fuel pumps group and is adapted to work with diesel fuel in modern TDI units. The design has been engineered for:

• maintaining high operating pressure under variable engine load,
• precise fuel dosing in common rail systems,
• cooperation with factory sensors and control valves.

The presence of dedicated part numbers and interchangeable numbers (visible in the technical specification) makes it easier to select the pump based on OEM markings or the VIN, which is particularly important for modern diesel units.

Condition, verification, and service application

The offered pump is a used component, which makes it an attractive cost-effective alternative while maintaining the original design. Such components are often chosen for:

• routine fuel system repairs after pump or injector failure,
• diesel engine overhauls,
• service projects where compliance with factory specifications is crucial.

Before installation, it is recommended to follow the standard fuel system diagnostic procedure and check the cleanliness of the fuel and filter to ensure proper operating conditions for the pump and reduce the risk of contamination.

Technical support and additional materials

For users who want to better understand the principles of the fuel supply system in diesel engines, component selection by OEM numbers, and the basics of diagnostics, the following article will be helpful: Fuel system – injectors, pumps, and fuel tank: maintenance and regeneration. It contains practical tips on operation, regeneration, and typical symptoms of fuel system component wear.

If you are planning a comprehensive repair or upgrade of the engine area in your Audi and need other elements from the same group, such as additional pumps, supply lines, or pressure control elements, check the available parts in the Audi high-pressure fuel pumps category.