Audi A4 B9 A5 F5 Q5 FY Fuel Injector Nozzle 2.0 TDI Diesel Bosch 04L130277N

Audi A4 B9 A5 F5 Q5 FY Fuel Injector Nozzle 2.0 TDI Diesel Bosch is an original fuel system component designed for diesel engines, ensuring precise fuel metering and stable engine operation. As part of the Injector Nozzles group, it is a key component for engine refinement, performance, and fuel economy. This used OEM Bosch injector allows for maintaining factory operating parameters without the need for system modifications.

Specifications and technical data

• SKU: 04L130277N
• Mark: Audi
• Condition: Used
• OEM Part Number: 04L130277N
• Substitutable numbers: 04L130277N, 04L 130 277 N
• Fuel type: Diesel
• Category: Fuel Injectors

Purpose and function of the injector

The presented fuel injector is a component of the diesel engine fuel system, responsible for the precise atomization of diesel fuel in the combustion chamber. A properly selected and functional injector contributes to:

• smooth engine operation across the entire rev range,
• stable cold and warm starts,
• reduction of smoke and noise characteristic of diesel engines,
• maintaining optimal fuel consumption and lower exhaust emissions.

Thanks to the use of Bosch technology, the injector works with the factory engine control unit, maintaining the parameters specified by the vehicle manufacturer.

Benefits of using an original Audi/Bosch injector

Choosing an original injector for an Audi with a 2.0 TDI engine primarily means guaranteed compatibility with the fuel system and predictable engine behavior. The OEM component is designed for specific engine characteristics, which translates into:

• correct fuel injection pressure and timing,
• retention of factory engine dynamics and flexibility,
• lower risk of ECU errors and limp mode,
• no need for system adaptation or hardware modifications.

A used OEM injector is also an attractive compromise between cost and quality – it allows you to maintain high reliability of the injection system at a lower cost than a new part.

Technical characteristics in the context of a diesel engine

The injector has been designed to work with a diesel unit, where precise high-pressure fuel metering is crucial. The design of the component is adapted to the specifics of a diesel engine, which means:

• appropriate shape and number of spray holes,
• controlled fuel spray formation in the combustion chamber,
• stable operation under a wide range of loads and temperatures.

An injector configured in this way helps reduce vibrations, improves engine refinement, and supports the proper operation of the diesel particulate filter (DPF) and other exhaust system components.

Condition, installation, and service application

The offered item is a used OEM injector, which in practice means it retains the original geometry and operating parameters specified by the vehicle manufacturer. Before installation, a standard service procedure is recommended: leak testing, checking parameters on a test bench, and installation using new seals in accordance with the manufacturer's guidelines.

Replacing an injector is particularly recommended in the case of symptoms such as rough idling, power loss, increased smoke, or starting difficulties. A properly selected component restores the stability of the injection system and reduces the risk of secondary engine damage.

Diagnostics and prevention of the injection system

If you suspect problems with the injection system, it is worth familiarizing yourself with practical tips regarding symptoms and the effects of neglect. Detailed information on this topic can be found in the article Diesel injector faults – how to recognize them and the risks of neglecting them, which discusses typical symptoms, possible consequences, and basic diagnostic methods.

If you are considering a choice between an original part from the secondary market and a replacement, the guide 5 reasons why a used OEM part is a better choice than a replacement may also be helpful, presenting practical arguments and selection criteria for consumables.

Expansion and service of the Audi injection system

If you are planning a comprehensive repair or upgrade of the injection system area in your Audi and need other elements from the same group, such as additional injectors, nozzles, or spray elements, check the available parts in the Audi Injector Nozzles category.