Audi Q7 4.2 TDI Diesel Engine Fuel Injector Injection 057130277AG

The Audi Q7 4.2 TDI Diesel Fuel Injector is an original injector nozzle from the Audi group, designed for 4.2 TDI diesel engines. This component ensures precise diesel fuel dosing, which translates to stable engine operation and correct combustion characteristics.

Specifications and technical data

• SKU: 057130277AG
• Mark: Audi
• Condition: Used
• OEM Part Number: 057130277AG
• Substitutable numbers: 057130277AG, 057 130 277 AG
• Fuel type: Diesel
• Category: Fuel Injectors

Purpose and Role of the Injector in the Audi Q7 4.2 TDI

The injector nozzle in a diesel engine is responsible for accurately atomizing fuel in the combustion chamber, while maintaining the correct injection pressure and timing. In the 4.2 TDI unit, this is crucial for:

• maintaining smooth engine operation across the entire RPM range,
• stable combustion parameters under load and at idle,
• controlling exhaust emissions according to factory specifications,
• optimizing fuel consumption in urban and highway conditions.

Using an original injector nozzle in an Audi allows for the preservation of the fuel injection system's factory operating characteristics and reduces the risk of engine running issues.

Construction and Performance Parameters

The presented fuel injector belongs to the Injector Nozzles category and is designed for diesel-powered engines. Its construction has been developed to meet the requirements of the 4.2 TDI unit, taking into account:

• precise atomizer geometry, ensuring the correct fuel spray pattern,
• adaptation to high operating pressures typical of modern diesel systems,
• compatibility with the factory Audi engine control,
• use of materials resistant to thermal and chemical loads in the combustion chamber.

An injector configured in this way helps maintain the vehicle's proper dynamics, accurate throttle response, and predictable engine behavior during long-term use.

Characteristics of a Used Part

The offered injector is a used part, sourced from disassembly. This type of component is an attractive solution for users who:

• are looking for an original Audi part at a more favorable price than a new replacement,
• want to maintain the original fuel injection system specification,
• are planning an economical repair or replacement of a single injector.

Before installation, standard diagnostics and verification of the injector's operating parameters on the vehicle or a test bench are recommended to match it to the current engine condition and other components of the fuel injection system.

Benefits of Using an Original Audi Injector Nozzle

Using such an injector in an Audi Q7 4.2 TDI offers a range of practical benefits:

• preservation of factory engine operating characteristics – correct fuel doses and proper atomization,
• reduced risk of uneven running, jerking, and starting problems (hot or cold),
• better control over smoking and exhaust composition,
• consistency with other components of the fuel injection system and engine control.

This solution is particularly recommended for repairs where the priority is to maintain parameters close to factory specifications without the need for costly new components.

Diagnostics and Prevention of the Fuel Injection System

When replacing an injector, it is worth paying attention to symptoms typical of wear in diesel fuel injection system components, such as power loss, increased fuel consumption, or uneven idling. A detailed discussion of these issues can be found in the article "Diesel Injector Faults – How to Recognize Them and What Neglecting Them Entails", which describes the symptoms, consequences, and diagnostic methods for faulty injectors.

Other Audi Injector Nozzles

If you are looking for other Audi injector nozzles compatible with different models and engine versions, check out our category Audi Injector Nozzles, where you will find a wide selection of original fuel supply components for vehicles of this brand.