The Audi Q7 4.2 TDI Diesel Fuel Injector is a component of the fuel system designed for diesel engines, responsible for precise fuel metering within the powertrain. A correctly selected injector ensures stable engine operation, proper running characteristics, and predictable performance across the entire RPM range.
Specifications and technical data
- SKU: 057130277AK
- Mark: Audi
- Condition: Used
- OEM Part Number: 057130277AK
- Substitutable numbers: 057130277AK, 057 130 277 AK
- Fuel type: Diesel
- Category: Fuel Injectors
Purpose and Technical Characteristics
The presented fuel injector for Audi Q7 4.2 TDI belongs to the injector nozzles category and is compatible with diesel-powered engines. The component's design is adapted to the requirements of the V8 TDI unit, where precise fuel spray formation and repeatable dosing at high operating pressure are crucial.
The injector is designed as part of a common rail system, where maintaining adequate rail pressure and precise control over nozzle opening time are important. This allows for stable combustion, reduced smoke, and maintenance of correct exhaust emission parameters.
Benefits of Using a Functional Injector
A properly functioning injector nozzle in the Audi Q7 4.2 TDI directly impacts:
- even engine operation at idle and under load, without jerking or misfires,
- adequate dynamics during acceleration and flexibility in the mid-range RPM,
- controlled fuel consumption due to proper atomization and diesel fuel metering,
- reduced excessive smoke from the exhaust system, which helps maintain the efficiency of the particulate filter and catalytic converter,
- decreased mechanical stress on the crankshaft and piston assembly through uniform combustion pressure in the cylinders.
Selecting the correct injector for a specific engine version is crucial for maintaining the powertrain's factory operating parameters and the longevity of other fuel system components.
Component Condition and Service Application
The offered fuel injector is a used part, making it an attractive solution for service repairs where cost optimization while maintaining an appropriate level of quality is a priority. Such components are often chosen for:
- diagnosing uneven engine operation and the need to swap an injector to verify a fault,
- partial regeneration of the injection system when replacing all nozzles simultaneously is not economically justified,
- post-accident repairs or after mechanical damage to the cylinder head and engine accessories.
Before installation, standard service procedures are recommended, such as checking parameters on a test bench and verifying tightness, to match the component's operating characteristics with the other injectors in the engine.
Diagnostics and Prevention of the Injection System
In case of symptoms such as difficulty starting a warm or cold engine, increased fuel consumption, power loss, or excessive smoke, it is worth consulting the guide “Diesel Injector Faults – How to Recognize Them and What Neglecting Them Entails”. The article discusses typical symptoms of worn injector nozzles, possible consequences of ignoring the problem, and basic diagnostic methods, which facilitates the decision to replace or regenerate the component.
Other Audi Injector Nozzles
If you are looking for other Audi injector nozzles for different models or engine versions, check the available assortment in the Audi injector nozzles category. This will allow you to select components matched to the specific engine number and fuel system configuration, which facilitates repair planning and minimizes the risk of errors in part selection.
