Genuine 13 90 7 506 739 Fuel Tank Breather Valve - 13 90 7 506 739

The Genuine BMW Fuel Tank Breather Valve (part number 13 90 7 506 739) is a critical component of the evaporative emissions control (EVAP) system. This valve regulates the release of fuel vapors from the fuel tank into the charcoal canister, preventing harmful hydrocarbons from escaping into the atmosphere.

Function and Purpose:

The tank vent valve serves a managed regeneration of carbon canister using scavenging air, with the scavenging air drawn through the carbon canister being enriched with hydrocarbons and then fed into the engine for combustion. The valve is closed when in a flow-free state, preventing fuel vapors from the carbon canister reaching the intake manifold when the engine is not running.

Key Features:

• Genuine BMW OEM replacement part
• Direct-fit design for proper function and installation
• Maintains proper fuel tank pressure and ventilation
• Reduces evaporative emissions and improves fuel efficiency
• Prevents check engine light codes related to EVAP system

Common Symptoms of Failure:

• Check engine light illumination
• Rough idling or engine performance issues
• Fuel odors near the vehicle
• Diagnostic trouble codes such as P0441, P0444, P0446

This is a factory-direct replacement part designed to restore proper operation of your BMW's emissions control system and eliminate related fault codes.