Petrol Fuel Pipe BMW F20 F30 F31 LCI F32 B48 Tank Breather Suction Pipe Hose

Petrol Fuel Pipe BMW F20 F30 F31 LCI F32 B48 Tank Breather Suction Pipe Hose is an original BMW fuel system component designed for petrol engines. It ensures proper tank ventilation, which promotes stable engine operation and reduces the risk of unwanted fuel supply issues.

Specifications and technical data

• SKU: 7645857
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7645857
• Substitutable numbers: 13907645857, 7645857
• Fuel type: Petrol
• Category: Hoses, Lines & Pipes

Function and role in the fuel system

The tank breather suction pipe in BMW F-series models with the B48 engine is responsible for the controlled flow of fuel vapors between the tank and other system components. A properly functioning pipe:

• stabilizes pressure in the tank during driving and refueling,
• limits fuel vapor emissions into the environment,
• supports the correct operation of the petrol supply system,
• reduces the risk of engine performance issues under variable loads.

For petrol units, it is particularly important to maintain the tightness and patency of the ventilation system, as this affects engine refinement and the consistency of combustion parameters.

Design and fitment for BMW F-series

The offered pipe belongs to the Lines, hoses and pipes category, designed specifically for the body and engine bay geometry of the BMW F20, F30, F31 LCI, and F32 with the B48 unit. This means:

• factory routing along original mounting points,
• compatible ends and connectors for the fuel system,
• appropriate material resistance to contact with petrol and its vapors.

As a result, installation is straightforward, without the need for modifications or additional adapters.

Part condition and service application

The pipe is a dismantled part, making it an attractive alternative to new components while maintaining the manufacturer's original specifications. This type of component is often chosen when:

• fixing leaks in the fuel system,
• diagnosing fuel odor issues near the wheel arch or tank,
• servicing the ventilation system after a collision or bodywork repairs.

A properly selected breather pipe helps restore correct fuel system operating conditions without interfering with other sub-assemblies.

Benefits of using an original BMW pipe

Using an original breather pipe in petrol BMW F-series vehicles offers a number of practical benefits:

• Consistency with the factory design – maintaining the original pipe routing and mounting points facilitates service and future inspections.
• Reduced risk of installation errors – matched connectors and pipe length minimize the possibility of incorrect connection.
• Stable fuel system operating conditions – proper ventilation promotes even petrol supply to the engine.

This solution is particularly recommended for repairs performed in workshops specializing in the BMW brand, where consistent results and compliance with technical documentation are essential.

Technical support and related materials

If you are planning a more extensive fuel system service or other work on your BMW, it is worth checking out other components from the Lines, hoses and pipes{data-blogs=category} group to select a set of parts tailored to the scope of work. For a better understanding of typical operational problems in models of this brand, the following guide article may also be helpful: BMW E90 engine failures – check what can ruin your budget, which shows how to properly plan repairs and avoid unnecessary costs.

Additionally, if you are interested in a broader context of operating and servicing BMW vehicles, take a look at our advice section: practical articles on BMW repairs and diagnostics{data-blogs=blog}, where you will find tips on working with fuel systems and related components.