Audi S4 B8 S6 C7 S7 4G Fuel Injector Nozzle 4.0 4.2 TFSI Petrol 079906036AC

Audi S4 B8 S6 C7 S7 4G Fuel Injector Nozzle 4.0 4.2 TFSI Petrol is an original component from the Fuel injector nozzles group, designed for high-performance TFSI petrol engines. It ensures precise fuel delivery, stable engine operation, and predictable performance under demanding road conditions. This is a solution for users who expect performance parameters consistent with the manufacturer's factory specifications.

Specifications and technical data

• SKU: 079906036AC
• Mark: Audi
• Condition: Used
• OEM Part Number: 079906036AC
• Substitutable numbers: 079906036AC, 079 906 036 AC
• Fuel type: Petrol
• Part type: Fuel Injector
• Category: Fuel Injectors

Purpose and role of the fuel injector in TFSI engines

The fuel injector in 4.0 and 4.2 TFSI units is responsible for precise atomization of petrol directly into the combustion chamber, which is crucial for power, torque, and engine refinement. A properly functioning component from this group helps maintain:

• stable pressure and uniform fuel delivery to each cylinder,
• the correct air-fuel mixture across the full load range,
• consistent combustion parameters during dynamic driving. As a result, the engines in S4, S6, and S7 models retain their characteristic responsiveness and predictable throttle response.

Benefits of using an original Audi fuel injector nozzle

Selecting a component from the correct design group has a direct impact on engine durability and safety. Using an original Audi fuel injector nozzle allows you to achieve:

• compatibility of injection characteristics with engine control unit maps,
• reduced risk of rough idling and hesitation during acceleration,
• lower probability of combustion chamber overheating resulting from an incorrect mixture composition,
• better repeatability of parameters under high load, typical for TFSI units. In practice, this translates into more predictable vehicle behavior and easier diagnostics of the entire petrol supply system.

Technical characteristics of the petrol injector

The presented injector operates in a fuel system based on petrol, which means it has different operating characteristics compared to diesel systems. The component from this group is designed for:

• precise fuel spray pattern in the combustion chamber,
• resistance to high temperature and pressure in turbocharged engines,
• cooperation with the advanced electronic control of TFSI units. Choosing the right injector nozzle is important not only for performance but also for the long-term condition of pistons, valves, and valve seats.

Condition of the component and service application

The offered injector is in used condition, making it an attractive service solution for budget repairs or restoring vehicle functionality after a single-cylinder failure. This type of component is often chosen as:

• a replacement for a damaged injector in one of the cylinders,
• a component for comparative testing during fuel system diagnostics,
• a solution for phased engine regeneration or upgrades. Before installation, standard workshop verification is recommended to match operating parameters to the specific engine unit.

Technical support and educational materials

Although the described component works with a petrol system, many diagnostic principles and symptoms of improper injector operation are similar to diesel solutions. It is worth familiarizing yourself with the material discussing typical symptoms and consequences of neglect, available in the article diesel injector faults – symptoms and consequences of neglect, to better understand the logic of the entire injection system. If you are planning a comprehensive repair or upgrade of the engine fuel supply area in your Audi and need other elements from the same group, such as individual injectors, complete sets, or auxiliary components, check the available parts in the Audi fuel injector nozzles category.