Genuine BMW 17-12-8-658-482 Coolant Expansion Tank Cap

The Genuine BMW Coolant Expansion Tank Cap (part number 17-12-8-658-482) is an original equipment manufacturer (OEM) replacement cap designed to maintain proper pressure in your BMW's cooling system. This cap seals the coolant expansion tank and regulates system pressure to prevent coolant loss and overheating.

Key Features:

• Genuine BMW OEM part ensures perfect fit and function
• Pressure-rated design maintains optimal cooling system performance
• Durable construction resistant to coolant and high temperatures
• Direct replacement for worn or damaged expansion tank caps
• Includes integrated pressure relief valve for system protection

Regular replacement of the expansion tank cap is important preventive maintenance, as the rubber seal and pressure valve can deteriorate over time. A failing cap can lead to coolant loss, air in the system, and potential overheating issues.