BMW E60 E81 X3 E83 E87 E90 E91 Fuel Rail Petrol N45 N46 7530420

BMW E60 E81 E87 E90 E91 Fuel Rail with Injectors is a complete fuel rail assembly with petrol injectors designed for BMW engines, specifically for units powered by petrol. This part comes from the original fuel system, ensuring proper operating parameters and compatibility with the factory engine characteristics.

Specifications and technical data

• SKU: 7530420-1
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7530420
• Substitutable numbers: 13537530420, 7530420, 7526892
• Fuel type: Petrol
• Category: Fuel Injectors

Application and Compatibility

The fuel rail with injectors has been developed for popular BMW models from the E60, E81, E87, E90, and E91 series that utilize a petrol injection system. The OEM design guarantees a precise fit with the intake manifold, cylinder head, and fuel lines, facilitating installation and minimizing the risk of leaks.

This component belongs to the Injector Nozzles category and is responsible for the precise metering of fuel into the cylinders, ensuring stable engine operation across the full range of loads. Using an original fuel rail with injectors helps maintain factory combustion parameters, smooth running, and proper throttle response.

Fuel Rail Construction and Function

The fuel rail acts as a fuel distributor to individual cylinders, while the integrated petrol injectors are responsible for atomizing fuel in the combustion chamber or intake manifold, according to the specific engine design. Key construction features include:

• Stable Fuel Supply – the rail maintains consistent pressure across all injectors, promoting even cylinder operation.
• Precise Metering – the petrol injectors deliver the correct amount of fuel based on engine load, RPM, and operating temperature.
• Engine Electronics Compatibility – the component is designed to be controlled by the factory ECU, allowing for the retention of stock injection maps.

By preserving the original geometry and mounting points, the fuel rail with injectors allows for installation without structural modifications, which is crucial for both repairs and restoring a vehicle to its factory condition.

Benefits of Using Genuine BMW Injector Nozzles

Choosing an original fuel rail with injectors from the Injector Nozzles category offers a range of practical advantages for everyday use:

• Stable Idle Operation – proper fuel atomization reduces misfires and uneven engine running.
• Improved Dynamics – correct petrol metering supports smooth acceleration and predictable throttle response.
• Optimal Fuel Consumption – maintaining factory injection parameters helps keep fuel consumption close to design values.
• Reduced Ancillary Load – even cylinder operation minimizes vibrations and mechanical stress, positively impacting engine longevity.

This type of part is particularly important in petrol engines, where fuel atomization quality directly affects exhaust emissions, running smoothness, and engine thermal safety.

Condition, Verification, and Service Application

The fuel rail with injectors is a used part, sourced from disassembly, allowing for an economical repair of the fuel system while maintaining original manufacturer specifications. This type of part is a good choice in situations where:

• starting problems occur with a warm or cold engine,
• hesitation, power loss, or rough idling is experienced,
• diagnostics indicate simultaneous malfunction of multiple injectors.

Before installation, it is recommended to perform professional fuel system diagnostics and a leak test to fully utilize the potential of the offered fuel rail with injectors and avoid secondary faults.

BMW Injector Nozzles – Selection and Technical Knowledge

If you are looking for other BMW injector nozzles for your model, please check our dedicated category: BMW injector nozzles. Here you will find a wide selection of fuel injection system components tailored to various series and engine variants.

Although the described component pertains to a petrol system, many principles of injection diagnostics are common across different engine types. It is worthwhile to familiarize yourself with material discussing the symptoms and consequences of neglecting the injection system, available in the article diesel injector faults – symptoms, consequences, and diagnostics. This will help you better understand the importance of functional injectors for engine durability and operational safety.