BMW E90 F20 F30 M135i 335i N55 Petrol Fuel Rail Injector System Sensor 7576779

BMW E90 F20 F30 M135i 335i N55 Petrol Fuel Rail Injector System Sensor is an original fuel system component designed for N55 petrol engines in selected BMW 1 Series, 3 Series, and M Performance models. Thanks to its OEM design, it ensures consistency with factory engine control unit calibration, and the integrated fuel pressure sensor allows for precise control of engine operating parameters. This solution is dedicated to users who expect reliable fuel injection system performance and the maintenance of stock power output.

Specifications and technical data

• SKU: 7576779-2
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7576779
• Substitutable numbers: 7576779, 13537576779
• Fuel type: Petrol
• Category: Fuel Injectors

Purpose and function in the fuel injection system

The fuel rail with a petrol sensor is responsible for the even distribution of fuel to the injectors and monitoring pressure in the high-pressure rail. In the N55 engine, used in models such as the BMW E90, F20, F30, M135i, and 335i, a properly functioning rail is crucial for:

• stable idle operation,
• correct fuel metering under load,
• maintaining proper combustion parameters,
• reducing the risk of power loss or hesitation during acceleration.

Thanks to the integrated pressure sensor, the engine control unit continuously corrects the fuel dose, which translates into responsive throttle reaction and the maintenance of factory engine performance characteristics.

Benefits of using an original fuel rail

Using an original fuel rail in an N55 petrol engine allows for the preservation of parameters specified by the manufacturer. In practice, this means:

• compatibility with factory ECU software – no need to adapt non-factory solutions,
• proper geometric fitment to the cylinder head and injectors,
• correct cooperation with the stock high-pressure fuel pump,
• reduced risk of leaks in the fuel system.

For users of cars with increased power (e.g., mild software tuning), maintaining proper fuel pressure is particularly important, which is why a functional petrol sensor in the rail has a direct impact on engine safety.

Component condition and installation aspects

The offered fuel rail is a salvaged part from the Injector Nozzles category, meaning it was designed to operate in the demanding high-pressure fuel environment. Before installation, a standard service procedure is recommended, including checking the system for leaks, inspecting seals, and ensuring the cleanliness of injector seats. A properly installed rail, working with correctly functioning injectors, helps reduce the risk of:

• starting difficulties on both warm and cold engines,
• uneven engine operation,
• excessive fuel consumption.

Due to its factory origin, installation is essentially plug-and-play, without the need for modifications to the fuel system in the engine bay.

Diagnostics and maintenance of the fuel injection system

In the event of fuel system issues – such as power drops, fuel pressure errors stored in the ECU, or noticeable hesitation – one of the components requiring verification is the fuel rail and its sensor. Regular diagnostics of fuel pressure parameters and checking the condition of the injectors allows for early detection of irregularities and helps avoid more serious engine damage.

To expand your knowledge on typical symptoms of fuel injection system wear, it is worth checking out our guide: injector faults – symptoms, effects, and diagnostic methods. Although the article focuses on diesel units, the principles of injection analysis and service maintenance described there are also helpful when assessing the condition of petrol systems.

Expanding the BMW fuel system

If you are planning a comprehensive repair or upgrade of your BMW's engine area and need other parts from the same group, such as injectors, fuel lines, or additional fuel rail components, check out the available parts in the BMW Injector Nozzles category.

Selecting components from the same functional group allows for maintaining consistency in fuel system operating parameters, which translates into stable petrol engine performance and predictable vehicle behavior across the entire rev range.