BMW X3 X5 E60 E61 E65 E83 E53 M57N Fuel Pressure Rail Accumulator

The BMW X3 X5 E60 E61 E65 E83 E53 M57N fuel rail with sensor is a fuel system component designed for BMW M57N diesel engines, used in series such as X3, X5, and E60, E61, E65, and E83. This product from the Injector Nozzles category helps restore proper common rail system operation and stabilize fuel pressure.

Specifications and technical data

• SKU: 7788679-2
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7788679
• Substitutable numbers: 13537805726, 7805726, 13517788679, 7788679
• Category: Fuel Injectors

Application and Function in the Injection System

The fuel rail integrated with a pressure sensor is responsible for uniform fuel distribution to the injectors and precise measurement of pressure in the common rail. In M57N engines, it is crucial for:

• fuel pressure stabilization across the entire engine load range,
• accurate injection dosing by the engine control unit,
• reduction of engine vibrations and uneven running,
• maintenance of correct combustion parameters and exhaust emissions.

A properly selected fuel rail with a sensor is particularly important in powerful BMW diesel engines, where the fuel system operates under high load and requires stable sensor readings.

Benefits of Using an Original BMW Fuel Rail

The offered part comes from the BMW OE line, which means it retains factory operating parameters and is fully compatible with the fuel system design in M57N engines. Using an original fuel rail with a sensor ensures, among others:

• proper cooperation with the factory engine control unit without the need for software adaptation,
• appropriate pressure sensor measurement characteristics matched to BMW injection maps,
• stable injector operation at high working pressure,
• reduced risk of diagnostic errors related to incorrect fuel pressure readings.

This solution is particularly recommended for issues with hot starting, power loss, or the appearance of injection system errors in M57N engines.

Component Condition and Installation Aspects

The fuel rail with sensor is offered as a used part, allowing for an economical repair of the fuel system while maintaining an OEM-class component. This type of part is designed for installation in place of the factory rail, preserving the original mounting points and connections for injectors and high-pressure lines.

During replacement, it is recommended to:

• thoroughly clean the seats and lines before installation,
• use new seals compliant with the manufacturer's specifications,
• check system tightness after starting the engine,
• perform computer diagnostics to verify rail pressure values.

Fault Diagnosis and Technical Support

Problems with the fuel rail or pressure sensor often manifest as uneven engine operation, power loss, limp mode, or errors stored in the control unit. To better understand the relationships between injectors, the rail, and the pressure sensor, it is worth reading the guide: Diesel injector faults – how to recognize them and what are the consequences of neglecting them. The article discusses typical symptoms, consequences of neglect, and the basics of diagnosing the injection system in diesel engines.

Related Products and Further System Expansion

If you are looking for other parts from the BMW Injector Nozzles category for your car, check out the BMW injector nozzles available in our store. This will allow for a comprehensive approach to fuel system servicing and selecting components from a single, cohesive product line.