Fuel Injection Pump BMW E81 E82 E87 LCI E88 123d N47S High Pressure 7801000

BMW E81 E82 E87 LCI 123d E88 N47S Diesel Injection Pump 7801000 is a specialized component of the diesel engine fuel system, designed for BMW 1 Series models with the N47S engine. This used injection pump from the Injector Nozzles category allows for an economical yet technically correct repair of the common rail system in BMW diesel cars.

Specifications and technical data

• SKU: 8577644-2
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 8577644
• Substitutable numbers: 8577644, 13518577644, 7801055, 13517801055, 7812053, 13517812053, 7801000, 0445010509, 0 445 010 509
• Fuel type: Diesel
• Category: Fuel Injectors

Application and Compatibility with N47S Engine

The offered injection pump for BMW with N47S diesel engine is designed to work with the factory injection system in BMW E81, E82, E87 LCI 123d, and E88 models. The OEM design ensures proper fuel pressure parameters, stable operation across the entire load range, and correct interaction with the engine control electronics.

This component comes from the line of original BMW parts, which translates to perfect fit for mounting points, fuel lines, and electrical connectors. This makes the pump suitable as a replacement for the factory-installed component in the common rail system.

Technical Characteristics of the Diesel Injection System

The injection pump operates within the high-pressure diesel engine system, responsible for:

• generating the correct fuel pressure in the common rail, according to the engine control unit maps,
• stabilizing fuel supply parameters under variable load and rotational speed,
• ensuring uniform injector operation across the entire RPM range.

Being dedicated to Diesel fuel means the pump's construction is adapted to the properties of diesel oil, including operation at high pressure and meeting the demands of modern BMW units.

Benefits of Using an Original BMW Injection Pump

Using a used, original injection pump in a BMW 1 Series with an N47S engine allows for maintaining the factory operating parameters of the powertrain. Key advantages include:

• compatibility with the factory control unit software – no need to modify injection maps,
• correct mechanical fit – proper positioning on the engine and compatible connections,
• maintaining the diesel engine's refinement – reduced vibrations, correct throttle response, stable idle speed.

For users seeking a service solution that adheres to manufacturer standards, such a pump offers a sensible compromise between cost and quality.

Condition, Verification, and Service Application

The injection pump is offered as a used part, which helps reduce the cost of repairing the injection system while maintaining original BMW specifications. Before installation, the standard service procedure is recommended: checking the fuel system for leaks, verifying the condition of filters, and checking operating parameters with computer diagnostics after installation.

To better understand the symptoms of wear in injection system components and the consequences of neglecting them, it is worth reading the guide: Diesel Injector Failures – How to Recognize Them and What Neglecting Them Entails. This will allow for informed repair planning and assessment of the condition of other common rail system components.

Other BMW Injector Nozzles

If you are also looking for other BMW injector nozzles for your car, check out our dedicated category: BMW Injector Nozzles. There you will find a wide selection of injection system components tailored to various BMW models and generations.