Bosch 13-90-7-621-174 Fuel Tank Breather Valve

The Bosch 13-90-7-621-174 is a fuel tank breather valve designed to regulate fuel tank ventilation and maintain proper pressure in the fuel system. This emissions control component allows the fuel tank to breathe during normal operation while preventing harmful fuel vapors from escaping into the atmosphere, ensuring compliance with emissions standards.

Key Features:

• OE-quality construction from Bosch, a trusted automotive systems supplier
• Maintains proper fuel tank pressure during temperature changes and fuel consumption
• Prevents fuel vapor emissions for cleaner operation
• Direct replacement for worn or failed original equipment
• Helps prevent check engine lights related to EVAP system faults

This breather valve is a critical component of the evaporative emissions (EVAP) system, working to balance pressure in the fuel tank as fuel is consumed and as temperature fluctuations occur. A faulty breather valve can lead to fuel tank pressure issues, difficulty refueling, or illuminated warning lights.

OEM Part Number: 13-90-7-621-174, 13907621174