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 factory-spec fuel system component designed for diesel engines, engineered to maintain stable pressure in the common rail. Thanks to its precise construction and perfect fit for the CAGA engine, it ensures consistent fuel metering and efficient cooperation with the engine control electronics. This is the ideal solution for users who expect consistent fuel system performance without uncontrolled pressure drops.

Specifications and technical data

• SKU: 03L130755A-1
• 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 presented pump belongs to the High-pressure fuel pumps category and is dedicated to the diesel engine in the Audi A4 B8 with the CAGA unit. It is responsible for generating the high fuel pressure necessary for the injectors to function correctly, which translates into engine refinement, dynamics, and fuel consumption. A properly selected high-pressure pump reduces the risk of starting problems, jerking during acceleration, and errors related to rail pressure.

Construction and performance parameters

The pump is designed as a component that works with the common rail system in a diesel engine, where maintaining stable pressure across a wide range of loads is crucial. Its design provides:

• precise high-pressure fuel delivery,
• supply and return channels designed specifically for diesel engines,
• compatibility with sensors and the engine control unit responsible for dose regulation.

As a result, the pump allows for maintaining the correct injection characteristics at both low and high RPMs, which is essential for the efficiency and durability of the power unit.

Condition, fitment, and installation

The item is offered as a used part, which allows for an economical repair of the fuel system while maintaining the manufacturer's original specifications. The pump is intended for installation in Audi diesel engines where compliance with the factory common rail system is required. When selecting, it is recommended to verify compatibility using the OEM number and interchangeable numbers to ensure a perfect fit for your specific vehicle configuration.

In practice, installation involves replacing the factory pump, while following procedures for bleeding the fuel system and checking for leaks. A correctly selected and installed component reduces the risk of leaks, pressure drops, and secondary damage to the injectors.

Benefits of using an original high-pressure pump

Using a high-pressure pump dedicated to the Audi A4 B8 2.0 TDI CAGA allows you to maintain engine performance parameters in line with the manufacturer's requirements. Key benefits include:

• stable pressure in the common rail system, essential for smooth injector operation,
• preservation of factory starting and acceleration characteristics,
• reduced risk of overheating and excessive injector load,
• easier diagnostics – the pump's operating parameters are known to the engine control unit.

For users, this means more predictable vehicle behavior, better throttle response, and the possibility of more effective computer diagnostics in the event of any faults.

Selection, diagnostics, and technical knowledge

When replacing a high-pressure pump in a diesel engine, it is worth relying on OEM data and reference numbers to avoid compatibility issues. It is also helpful to check the history of the fuel system – the condition of the filter, fuel quality, and any potential metal shavings in the circuit, which can affect the lifespan of the newly installed component.

If you want to better understand the relationships between the pump, injectors, and fuel tank, as well as learn the principles of diagnostics and regeneration, check out the article Fuel system – injectors, pumps, and fuel tank: maintenance and regeneration, where you will find practical tips, tables, and answers to frequently asked questions.

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, control elements, or power supply components, check out the available parts in the Audi high-pressure fuel pumps category.