Audi A4 B8 2.0 TDI CAGA Diesel High Pressure Fuel Pump 03L130755A

Audi A4 B8 2.0 TDI CAGA Diesel High Pressure Fuel Pump is a specialized fuel system component designed for diesel engines, ensuring stable fuel pressure in modern TDI units. Thanks to a design tailored to the specifics of the CAGA engine, the pump supports precise diesel fuel dosing, which translates into smooth engine operation and proper interaction with the injection system. This is a solution for users looking for a proven component from the High pressure fuel pumps category for their Audi.

Specifications and technical data

• SKU: 03L130755A
• Mark: Audi
• Condition: Used
• OEM Part Number: 03L130755A
• Substitutable numbers: 03L130755A, 03L 130 755 A, 0445010507, 0 445 010 507
• Fuel type: Diesel
• Category: High Pressure Fuel Pumps

Purpose and role in the fuel system

The described high-pressure pump is a component of the diesel engine fuel system, responsible for generating sufficiently high fuel pressure for the injectors. In the 2.0 TDI CAGA engine, it operates within a common rail system, where stable pressure is crucial for proper diesel atomization, engine refinement, and maintaining exhaust emission parameters.

In practice, this means that a properly functioning pump reduces the risk of starting problems, power drops, or uneven idle operation. Replacing a worn-out component with a functional unit allows for restoring correct pressure values in the common rail and ensuring predictable engine behavior across the full load range.

Construction and performance parameters

The pump belongs to the High pressure fuel pumps group, meaning it is designed to operate under significant hydraulic and mechanical loads typical of modern diesel units. The construction is adapted for use with diesel fuel, and internal working components are designed for resistance to variable operating conditions, frequent load changes, and long-term operation.

As a common rail system component, the pump works with pressure sensors and the engine control unit, which continuously adjusts its operation. A correctly selected component allows for maintaining factory fuel dose characteristics, which is important for both performance and fuel consumption.

Product condition and practical application

The offered pump is an aftermarket component, which allows for economical repair of the fuel system while maintaining proper fitment for the 2.0 TDI CAGA unit. This type of component is particularly useful when troubleshooting issues related to incorrect fuel pressure, ECU errors concerning the injection system, or starting problems on both warm and cold engines.

Selecting a pump compatible with the engine code and common rail system parameters is essential to avoid compatibility issues, so it is worth verifying compatibility by OEM number or vehicle catalog data before installation. A properly selected element allows for maintaining correct interaction with existing injectors and engine accessories.

Benefits of a correctly selected high-pressure pump

• Stable pressure in the common rail – proper injector operation and uniform mixture combustion.
• Better diesel engine refinement – reduction of vibrations, jerking, and misfires.
• Support for correct exhaust emission parameters – important for technical inspections.
• Possibility of effective regeneration of the entire fuel system thanks to a compatible component.

For users who want to deepen their knowledge on the diagnostics and operation of the fuel system, an article describing the operation of injectors, pumps, and the fuel tank will be useful – details can be found in the material Fuel system – injectors, pumps, and fuel tank: maintenance and regeneration.

Part selection and expanding the scope of repairs

When planning service work within the diesel fuel system, it is worth considering not only the pump itself but also the condition of the injectors, high-pressure lines, and the fuel filter. A comprehensive approach to service reduces the risk of recurring faults and ensures stable operation of the power unit in the long term.

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 fuel pressure control elements, check the available parts in the Audi high pressure fuel pumps category.