The Womala Expansion Tank Cover 17117639020 is a critical component designed to maintain proper pressure within your vehicle’s cooling system. Crafted for vehicles such as the X3, X5, and 3 Series, this coolant reservoir cap ensures the engine operates at optimal temperature by regulating the pressure in the expansion tank and preventing coolant evaporation or leakage.

Over time, worn or damaged expansion tank caps can lead to overheating, coolant loss, or system pressure failure. This precision-engineered cap helps preserve the functionality and longevity of the entire cooling system, ensuring consistent and safe vehicle performance under varying driving conditions.

Installation Position:

• Location: Installed on top of the coolant expansion tank, typically found on the passenger side or near the front right of the engine bay

• System: Engine cooling system

• Function: Maintains proper pressure in the cooling system, prevents coolant loss, and ensures efficient engine temperature regulation

Key Features:

• Pressure-Regulating Seal: Built-in pressure valve maintains system pressure and reduces the risk of coolant boiling or overflow

• Durable Thermoplastic Material: Heat- and corrosion-resistant cap designed to withstand extreme engine bay temperatures

• Secure Fitment: Threaded locking mechanism ensures a tight and reliable seal to prevent leaks

• Prevents Overheating: Helps maintain coolant levels and system pressure, reducing the risk of engine overheating

• OEM-Level Design: Matches original design specifications for seamless integration with factory components

• Easy Installation: Direct-fit replacement requires no modifications for installation

The Womala 17117639020 Expansion Tank Cover is a vital replacement part for maintaining cooling efficiency and pressure stability in models such as the X3, X5, and 3 Series. It supports long-term engine reliability and helps prevent costly overheating-related damage.

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