Audi Q7 4L 3.0 TDI Diesel Engine Fuel Injector Unit 0445117 059130277EJ

Audi Q7 4L 3.0 TDI Diesel Engine Fuel Injector Unit is an original fuel system component designed for Audi diesel engines, ensuring precise fuel dosing and stable engine performance. As a part from the Injector nozzles category, it has been engineered to meet the requirements of the 3.0 TDI engine, which translates into predictable operating parameters and proper compatibility with the factory ECU. This used injector allows for an economical and technically sound repair of the injection system without the need for more expensive solutions.

Specifications and technical data

• SKU: 059130277EJ-2
• Mark: Audi
• Condition: Used
• OEM Part Number: 059130277EJ
• Substitutable numbers: 059130277EJ, 059 130 277 EJ
• Fuel type: Diesel
• Part type: Fuel Injector
• Category: Fuel Injectors

Purpose and function of the injector

The presented fuel injector is a component of the diesel fuel system in the Audi Q7 4L 3.0 TDI. Its task is to precisely atomize diesel fuel in the combustion chamber while maintaining the correct pressure and injection timing. A properly functioning injector contributes to:

• smooth engine operation across the entire rev range,
• stable cold and warm starts,
• controlled fuel consumption,
• reduction of smoke and exhaust emissions.

Thanks to being matched to the specific 3.0 TDI engine type, the injector works with the factory control system, which facilitates diagnostics and subsequent calibration in the workshop.

Benefits of using an original Audi injector

Choosing an original Audi injector from the Injector nozzles category is a solution that allows you to maintain the factory engine performance parameters. The design of the component is adapted to the characteristics of the 3.0 TDI unit, ensuring that:

• the correct fuel dosage characteristics are maintained under various load conditions,
• the engine control unit does not require non-factory adaptations,
• it is easier to maintain engine refinement and reduce vibrations,
• the risk of improper combustion is reduced.

Original manufacturing also promotes compatibility with other injection system components, such as the common rail or the high-pressure pump, which is important for the long-term operation of the vehicle.

Technical and fuel characteristics

The injector is designed to work with Diesel fuel, in accordance with the requirements of the 3.0 TDI engine. The appropriate design of the nozzle and the internal control valve allows for the correct fuel spray pattern, which translates into efficient combustion. From the user's perspective, this means:

• more predictable throttle response,
• easier maintenance of power and torque in daily driving,
• reduction of the risk of knocking typical of faulty injectors.

The component is intended for installation in a high-pressure system, which is why it is crucial to maintain cleanliness during installation and perform subsequent verification of operating parameters on a diagnostic bench.

Condition, installation, and service application

The offered injector is a used component, which allows for lower repair costs while maintaining compliance with Audi's factory specifications. This type of part is suitable both for replacing a single faulty injector and for the staged regeneration of the entire injection system. It is recommended that the installation be performed by a workshop with experience in TDI engines, using appropriate tightening and adaptation procedures.

In workshop practice, such an injector is often used as a replacement in situations where the existing component shows signs of wear, such as uneven idling, increased smoke, or power loss. A properly selected and installed injector helps restore the stability of the engine unit.

Diagnostics and technical knowledge

Before deciding to replace an injector, it is worth performing a full diagnostic of the injection system, including reading fuel trim values, a leak-off test, and evaluating engine performance under load. To better understand typical symptoms of damage and the consequences of neglect, it is worth consulting our guide: diesel injector faults – symptoms, effects, and diagnostics. This will allow you to choose the right repair strategy and avoid secondary damage to other engine components.

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