BMW E46 Petrol N46 Petrol Crankcase Ventilation Breather Pipe Hose Line 7513903

BMW E46 Petrol N46 Petrol Crankcase Ventilation Breather Pipe Hose Line is an original component from the Lines, hoses and pipes category, designed for petrol systems in N42 and N46 engines. It ensures proper vapor extraction and stable operation of the power unit, which translates into smoother engine performance and predictable vehicle behavior.

Specifications and technical data

• SKU: 7513903
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7513903
• Substitutable numbers: 11157513903, 7513903, 11157503522, 7503522
• Fuel type: Petrol
• Category: Hoses, Lines & Pipes

Purpose and function of the breather pipe

The breather pipe in petrol engines plays a key role in controlling vapors and pressure within the system. For N42 and N46 units, it is responsible for:

• stable extraction of vapors from the engine compartment or crankcase ventilation system,
• maintaining the correct operating pressure in the system,
• reducing the risk of leaks and improper air-fuel mixture operation,
• reducing the risk of errors related to petrol engine performance.

Thanks to a properly selected breather pipe, the system operates in a predictable manner, and throttle response remains smooth and consistent.

Compatibility with petrol engines

The offered pipe has been designed with petrol units in mind, which is particularly important in the context of resistance to fuel vapors and operating temperatures. Fuel type: petrol means that the material and geometry of the pipe are adapted to the operating characteristics of petrol engines, including:

• contact with fuel and oil vapors within typical temperature ranges,
• operation in an engine compartment exposed to variable thermal conditions,
• compatibility with the factory ventilation system used in the BMW E46.

Such a fit reduces the risk of premature wear and leaks, which could lead to a drop in performance or unstable idle speed.

Characteristics of the used component

The breather pipe is a used component, which in practice means it comes from disassembly and has been verified for installation suitability. For many BMW E46 users, this is a sensible choice, allowing for the maintenance of original specifications while optimizing service costs.

In the case of lines, hoses, and pipes, it is essential to maintain factory geometry and connection diameters – using an original component from disassembly facilitates installation and limits the need for system modifications.

Benefits of using an original BMW pipe

Choosing a breather pipe dedicated to the BMW E46 with N42/N46 engines brings a number of practical benefits:

• Factory fit – the pipe is designed for specific power units, which facilitates installation and ensures proper routing in the engine compartment.
• Consistency with the petrol system – the material and cross-sections are adapted to work with petrol vapors, which promotes engine stability.
• Reduced risk of leaks – a properly selected pipe reduces the chances of vacuum leaks and associated ECU errors.
• Economical repair – a used component allows for maintaining high quality at lower costs compared to new aftermarket replacements.

BMW lines, hoses and pipes – system expansion and service

If you are planning a comprehensive repair or upgrade of the engine area in your BMW and need other components from the same group, such as vacuum lines, cooling hoses, or breather pipes, check the available parts in the BMW lines, hoses and pipes category.

If you are also interested in improving the ergonomics and appearance of the cabin, it is worth checking out the guide on interior modifications – you will find practical tips in the article Car interior tuning with Global Parts, which describes how to use used components to refresh the vehicle's interior.