Audi S4 B9 Q5 FY Fuel Rail Injectors Left 3.0 TFSI is an original fuel supply system component designed for 3.0 TFSI gasoline engines in sporty Audi models. This product from the injector nozzles category ensures precise fuel delivery to the cylinders, translating to stable engine operation and predictable performance.
Specifications and technical data
- SKU: 06M133315L-1
- Mark: Audi
- Condition: Used
- OEM Part Number: 06M133315L
- Substitutable numbers: 06M133315L, 06M 133 315 L
- Location on the vehicle: Left
- Category: Fuel Injectors
Purpose and Function of the Fuel Rail
The left-side fuel rail with injectors is responsible for the even distribution of fuel to individual cylinders in the 3.0 TFSI engine. A correctly selected component in this part of the fuel system is crucial for:
- stable fuel pressure across the entire RPM range,
- precise mixture dosing injected into the combustion chambers,
- maintaining engine smoothness under load and in dynamic driving modes.
In Audi S4 B9 and Q5 FY models with the 3.0 TFSI engine, properly functioning injectors are particularly important due to the high-performance nature of the design and demanding operating characteristics.
Benefits of Using an Original Audi Fuel Rail
Choosing a component from the injector nozzles group specifically designed for a particular engine reduces the risk of starting problems, rough idling, or power loss. Using the original left-side fuel rail with injectors allows for:
- consistency with the factory engine control unit characteristics – no need for adaptation of aftermarket parts with different flow rates,
- correct fuel spray pattern formation in the combustion chamber, promoting efficient combustion and reducing carbon deposits,
- better injection repeatability under high load, essential in turbocharged engines.
This solution is particularly beneficial for users who expect to maintain factory performance and predictable engine behavior throughout its operating range.
Installation Characteristics and Fitment
The presented left-side fuel rail with injectors is designed for installation in the correct location on the engine, following the factory equipment layout. This ensures:
- mounting geometry matches original connection points,
- fuel line routing remains consistent with factory pathways,
- integration with the existing control system requires no installation modifications.
This type of fitment is important for both standard maintenance replacements and repairs after fuel system failures, where quick and predictable installation is key.
Practical Service Application
In high-performance vehicles such as the Audi S4 B9 or Q5 FY with the 3.0 TFSI engine, the injection system operates under significant load. Replacing the left-side fuel rail with injectors is recommended, among other things, for:
- identified issues with cylinder running smoothness,
- diagnosing errors related to fuel delivery corrections,
- mechanical damage or leaks within the fuel rail or injectors.
Selecting a component that matches the factory specifications helps reduce post-installation diagnostic time and simplifies verification of the entire fuel system's correct operation.
Related Audi Injector Nozzles
If you also need other components from the Audi injector nozzles category for your car, check out the Audi injector nozzles available in our store to select a complete fuel system solution.
Technical Support and Fuel System Knowledge
When diagnosing fuel injection problems in gasoline and diesel engines, it is advisable to use reliable sources of information. Symptoms of faulty injectors, their impact on engine operation, and verification methods are described in the article Diesel Injector Failures – How to Recognize Them and What Their Neglect Entails, which helps to better understand the importance of a functional injection system.
For those interested in a broader perspective on the construction and operation of the fuel system – from injectors, through pumps, to the tank – the guide Fuel System – Injectors, Pumps, and Fuel Tank: Maintenance and Repair may also be useful, containing practical tips on diagnostics and parts selection.
