Ventilation Valve BMW F10 M5 F12 F13 M6 Fuel Tank Breather Line 1-4 7847243

Ventilation Valve BMW F10 M5 F12 F13 M6 Fuel Tank Breather Line is an original BMW fuel system component designed for gasoline engines. It ensures controlled fuel vapor discharge from the tank, supporting stable engine operation and the proper functioning of the exhaust emission system.

Specifications and technical data

• SKU: 7847243
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7847243
• Substitutable numbers: 7847243, 13907847243, 7843215, 13907843215
• Fuel type: Petrol
• Category: Hoses, Lines & Pipes

Purpose and function in the fuel system

The fuel tank breather line in BMW F10 M5 and BMW F12/F13 M6 models is responsible for the safe discharge of gasoline vapors and pressure equalization within the tank. A properly functioning component of this type:

• stabilizes pressure in the fuel tank during driving and refueling,
• supports the correct operation of the gasoline supply system,
• reduces the risk of leaks and vapor emissions,
• improves engine performance under variable loads.

By maintaining the factory geometry and diameter of the line, fuel vapor flow remains consistent with the manufacturer's design specifications, which is crucial for both performance and the durability of engine accessories.

Construction and fitment for BMW F10 M5 / F12 / F13 M6

The offered line belongs to the Lines, hoses, and pipes group, specifically designed to meet the requirements of high-performance units used in the BMW M5 F10 and M6 F12/F13. This means:

• a dedicated routing of the line in the engine bay and around the fuel tank area,
• mounting points designed for the specific model,
• compatibility with factory fuel system connectors and ports.

Such fitment facilitates installation and allows for maintaining the original routing of the system without the need for modifications or adapters.

Benefits of using an original BMW line

Using an original breather line in BMW M-series sports models provides measurable operational benefits:

• consistency with the factory fuel system design – maintaining fuel vapor flow parameters in accordance with BMW engineers' specifications,
• reduced risk of diagnostic errors related to the fuel system and vapor emissions,
• maintenance of stable operating conditions for the gasoline engine under high loads,
• easier diagnostics and service due to compliance with manufacturer documentation.

This solution is particularly recommended for repairs of high-performance vehicles, where the fuel system operates under more demanding thermal and pressure conditions.

Condition of the component and practical service application

The line is a salvaged part intended for reinstallation in BMW F10 M5 and F12/F13 M6 vehicles with gasoline engines. This type of component is often replaced preventively during work related to the fuel tank, EVAP system, or during major repairs of the rear fuel system installation.

In service practice, replacing the breather line is recommended when symptoms such as the smell of fuel near the wheel arch or tank, refueling issues, or errors related to the vapor discharge system appear. Using an original component allows for restoring proper operating parameters without experimenting with replacements of uncertain fitment.

Complementary items from the same group

If you are planning a comprehensive repair or upgrade of the fuel system area in your BMW and need other items from the same group, such as flexible fuel lines, breather hoses, or return pipes, check the available parts in the BMW lines, hoses, and pipes category.

Additional technical support

When working with fuel and cooling systems, it is worth paying attention to the general thermal condition of the engine and its cooperating components. Practical tips regarding the impact of engine operating temperature on its durability can be found in the article Engine cooling system – overheating, repair, and used radiators, which helps in better planning comprehensive service maintenance for BMW cars and other brands.