CONNECTION

Description

🌟 Product Description – 03H121118 Coolant Overflow Hose Adapter

The 03H121118 Coolant Overflow Hose Adapter is a genuine OEM Volkswagen/Audi part engineered to secure the coolant overflow hose connection. It helps maintain proper coolant circulation and system pressure, ensuring your engine stays at the correct operating temperature without leaks.

Over time, plastic adapters can weaken and crack due to engine heat cycles, vibration, and coolant exposure, causing leaks that may lead to overheating. Replacing this component with a genuine part restores reliability and keeps your cooling system working as designed.

🔹 Features & Benefits:

• OEM part number: 03H121118
• Genuine VW / Audi replacement part
• Connects and secures the coolant overflow hose
• Prevents coolant leaks and maintains proper system pressure
• Made from heat‑resistant, durable materials
• Direct fit for easy installation—no modifications required

Additional information