Genuine 8W0-121-081 AN Coolant Bypass Hose

The Genuine 8W0-121-081 AN is an OEM engine coolant bypass hose designed for Audi vehicles equipped with 2.0L turbocharged engines. This critical cooling system component facilitates the flow of coolant between the expansion tank and the engine, ensuring proper temperature regulation and preventing overheating.

Key Features:

• Genuine OEM part manufactured to exact Audi specifications
• Front upper position mounting for coolant reservoir connection
• Engineered for both manual and automatic transmission applications
• Direct replacement for worn or damaged coolant hoses
• Precision-molded design ensures leak-free operation

This breather tube is also known by alternate names including coolant overflow hose, coolant reservoir hose, and expansion tank bypass line. Common failure modes include leaks or physical damage due to heat cycling and wear, which can lead to coolant loss and engine overheating. Regular inspection and timely replacement of this hose helps maintain optimal cooling system performance and engine longevity.

OEM Part Numbers: 8W0 121 081 AN, 8W0-121-081-AN, 8W0121081AN, 8W0.121.081.AN