BMW F20 F21 F30 F31 LCI F32 Suction Jet Pump Line B38 B48 Petrol 7645853

BMW F20 F21 F30 F31 LCI F32 Suction Jet Pump Line B38 B48 Petrol is an original BMW fuel system component designed for petrol-powered models. It ensures proper fuel tank ventilation, stabilizes pressure, and supports the trouble-free operation of the entire system. This is a practical service solution for users who want to keep their vehicle in line with the manufacturer's specifications.

Specifications and technical data

• SKU: 7645853
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7645853
• Substitutable numbers: 13907645853, 7645853
• Fuel type: Petrol
• Category: Vacuum Pumps

Purpose and function in the fuel system

The fuel tank ventilation line in BMW F20, F21, F30, and F31 series models is responsible for the controlled flow of fuel vapors between the tank and other system components. In petrol-powered vehicles, this is particularly important for pressure stability, the correct operation of the fuel pump, and reducing the risk of vacuum or overpressure buildup in the tank.

Using a dedicated line in a petrol system helps to:

• maintain proper fuel tank ventilation,
• minimize the risk of engine power supply disruptions,
• reduce fuel vapor emissions into the environment,
• maintain compliance with the factory design of the BMW fuel system.

Compatibility and fitment for BMW

The component has been designed specifically for BMW F20, F21, F30, and F31 platforms, which translates into precise routing of the line within the chassis and correct connection to other components. The original geometry of the connectors and the appropriately selected internal diameter of the line facilitate installation and reduce the risk of leaks.

By using a part from the BMW group, factory mounting points are preserved, and the line does not interfere with other installations in the vehicle. This is important both for standard service replacements and for repairs following mechanical damage in the fuel tank area.

Characteristics of the used component

The offered line comes from dismantling and is a used component, which is a reasonable choice for maintenance repairs in older vehicles. The used component allows for lower service costs while maintaining the original manufacturer's specifications, which is particularly important for fuel system components where fitment and sealing are critical.

Choosing an original, used fuel tank ventilation line is a compromise between price and maintaining the factory design of the system, without the need to use replacements with uncertain parameters.

Importance for diagnostics and fuel system service

Problems with fuel tank ventilation can manifest as difficulties with refueling, a characteristic suction sound when unscrewing the cap, or unstable engine operation. In such cases, checking the ventilation line is one of the basic diagnostic steps. Replacing it with a functional component restores proper vapor flow and stabilizes system operation.

For users who want to better understand the operation of the entire fuel supply system, the selection of parts by OEM numbers, and operating principles, the guide article Fuel system – injectors, pumps, and fuel tank: maintenance and regeneration, which discusses, among other things, diagnostics and the selection of fuel system components, will be helpful.

Service expansion within the same group of components

If you are planning a comprehensive repair or upgrade of the vacuum and ventilation area in your BMW and need other elements from the same group, such as additional lines, connectors, or mounting elements, check the available parts in the BMW Vacuum Pumps category.

Summary

BMW F20 F21 F30 F31 LCI F32 Suction Jet Pump Line B38 B48 Petrol is a practical service solution for owners of BMW models with petrol engines who want to restore proper fuel tank ventilation. The original design, fitment for specific body generations, and adherence to the factory fuel system concept make it a reasonable choice for repairs and inspections within the fuel supply system.