Fuel Pump BMW E90 LCI F20 F30 116d 118d 316d 318d N47N High Pressure 8509011

BMW E90 LCI F20 F30 118d 318d N47N High-Pressure Fuel Pump 8509011 is an original component of the diesel engine fuel system, designed for selected BMW models with the N47N unit. The high-pressure fuel pump ensures precise dosing of diesel fuel to the injectors, which translates into stable engine operation and correct power characteristics. This is a solution for users looking for a factory component with predictable operating parameters.

Specifications and technical data

• SKU: 8577649-2
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 8577649
• Substitutable numbers: 13518577649 8509011, 8577649, 13517823453 13518576514 13518509012, 7823453 8576514 8509012, ŁS
• Category: Fuel Injectors

Application and Role in the Fuel System

The high-pressure fuel pump in BMW diesel engines of the N47N family is responsible for generating the correct pressure in the common rail and stable supply to the injector nozzles. A properly functioning pump allows for:

• even engine operation across the entire RPM range,
• correct fuel dosage during cold and hot starts,
• proper engine running culture under load.

Selecting the right pump is crucial for protecting injectors, reducing the risk of overheating fuel system components, and maintaining factory fuel consumption parameters.

Compatibility with BMW Models

The presented pump has been designed to work with the N47N engine, installed in, among others, BMW E90 LCI, F20, and F30 series in the 118d and 318d versions. This means that the design, mounting points, and fuel connections are adapted to the factory system of these models, which facilitates installation and reduces the need for modifications.

By using a component from the BMW OE group, the original manufacturer's assumptions regarding performance, pressure characteristics, and cooperation with the engine control electronics are maintained.

Category: Injector Nozzles and Cooperation with the Injection System

Although the element is a high-pressure fuel pump, the product has been assigned to the Injector Nozzles category because it directly cooperates with common rail injectors and has a significant impact on their durability. An efficient pump:

• stabilizes rail pressure, which facilitates precise nozzle opening,
• reduces the risk of overflows and uneven operation of individual cylinders,
• supports proper fuel atomization, which translates into lower consumption and better dynamics.

When replacing the pump, it is recommended to diagnose the entire injection system to avoid secondary damage to new or functional components.

Condition, Origin, and Benefits of Choosing BMW OE Parts

The offered pump comes from the BMW OE line, which means factory fit for a specific engine configuration and fuel system. As a used part on the secondary market, it represents a reasonable compromise between cost and maintaining the original manufacturer's specifications.

• Factory Fitment – no installation problems due to dimensional differences.
• Appropriate Operating Characteristics – consistent with engine control unit maps for the N47N unit.
• Economical Repair Option – particularly important for comprehensive injection system overhauls.

Injection System Diagnostics and Technical Knowledge

In case of starting problems, power loss, or uneven engine operation, it is worth performing a full fuel system diagnosis, including both the high-pressure pump and the injectors. Practical tips on the symptoms and consequences of neglecting injection components can be found in the article Diesel Injector Failures – How to Recognize Them and What Their Neglect Entails, which helps to better plan repairs and select appropriate components.

Related Products from the BMW Category

If you are also looking for other elements from the BMW Injector Nozzles category for your car, check out the BMW Injector Nozzles available in our store to complete the entire injection system based on components from a single, cohesive quality line.