Injector Pipe BMW F10 F11 F30 F32 Diesel N57 Fuel Pressure Hose Cyl 1-3 8506546

BMW F10 F30 F32 N57 Injector Fuel Pressure Line Cyl 1-3 is an original component of the diesel engine fuel system, designed for precise fuel delivery to the injectors of the first, second, and third cylinders. Engineered by BMW for N57 units, it ensures stable operating pressure in the common rail system, contributing to smooth engine operation and correct fuel dosage.

Specifications and technical data

• SKU: 8506546
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 8506546
• Substitutable numbers: 8506546, 13538506546
• Fuel type: Diesel
• Category: Fuel Injectors

Purpose and Role in the Injection System

The fuel pressure line for the injector in the N57 engine is responsible for the safe and leak-free transfer of diesel fuel from the common rail manifold to the injectors serving cylinders 1–3. A correctly selected component in this section of the injection system is crucial for:

• maintaining stable fuel pressure across the entire engine load range,
• precise fuel metering by the injectors,
• reducing vibrations and pressure pulsations in the high-pressure lines,
• minimizing the risk of leaks and spills in the cylinder head and common rail manifold area.

This component is dedicated to diesel engines, so its construction is adapted to the specific loads generated by the Diesel engine's injection system.

Line Construction and Technical Aspects

The injector fuel pressure line for cylinders 1–3 in the N57 engine belongs to the category of injector nozzles, which are components that directly interact with the injectors. The applied geometry and internal diameters are selected to:

• ensure adequate fuel flow at high operating pressure,
• maintain the correct injection characteristics across the entire RPM range,
• minimize pressure drops between the manifold and the injectors.

Original BMW manufacturing means adherence to factory tolerances, which is particularly important in the precise common rail system, sensitive to even the slightest deviations in flow and pressure.

Application in BMW Models with N57 Engine

The Injector Fuel Pressure Line Cyl. 1–3 has been developed for popular BMW F-series models such as the F10, F30, and F32, equipped with the N57 engine. Using the correct line in these units allows for:

• maintaining the engine's factory performance characteristics under load,
• stable injector operation across the entire RPM range,
• reducing the risk of engine control unit errors related to fuel pressure.

Selecting a component that matches the N57 design is particularly important for injector durability and the protection of the high-pressure pump.

Component Condition and Benefits of Installation

The offered line comes from the group of used BMW parts, allowing for an economical repair of the injection system while maintaining original specifications. A correctly selected and functional high-pressure line helps to:

• limit power losses resulting from fuel pressure issues,
• reduce the risk of uneven engine operation at idle and under load,
• decrease the possibility of errors related to fuel metering.

Replacing the line is recommended in case of any signs of leaks, corrosion, mechanical damage, or after interventions in the injection system, such as injector removal.

Injection System Diagnostics and Technical Knowledge

Problems with high-pressure lines often manifest similarly to typical diesel injector faults. To better understand the symptoms and consequences of neglecting this area, it is worth familiarizing yourself with the guide: Diesel Injector Faults – How to Recognize Them and What Neglecting Them Entails. This will allow for a more accurate assessment of when replacing the line is sufficient and when more extensive diagnostics are necessary.

Other BMW Injector Nozzles

If you are looking for other BMW injector nozzles – for example, for the remaining cylinders or other variants of the brand's diesel engines – check out our dedicated offer: BMW Injector Nozzles. This will help you easily select a complete set of fuel system components compatible with your car's specific configuration.