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$12.29
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:
| Weight | .15 lbs |
|---|---|
| Dimensions | 3.5 × 2 × 2 in |
| Mfg Part # | 03H121118 |
Covers the thermostat, located on the coolant flange
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Ensure a proper seal when installing your new thermostat. 50×4
Seals the connection between the oil cooler and the filter adapter. 59×5
O-Ring between thermostat housing and cylinder head
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