Four Seasons 021-121-050 E Coolant Bypass Pipe

The Four Seasons 021-121-050 E is an aftermarket replacement coolant bypass pipe designed for Volkswagen and Audi vehicles equipped with VR6 engines. This critical cooling system component connects the water pump to the thermostat housing, allowing hot coolant to bypass and maintain proper engine temperature regulation.

Key Features:

• Direct replacement for OEM part number 021 121 050 E
• Connects water pump to thermostat housing
• Routes under the intake manifold on VR6 applications
• Manufactured by Four Seasons, the largest aftermarket climate control and cooling parts supplier
• Designed to replace the commonly-failed factory bypass pipe

The original factory bypass pipe on VW/Audi VR6 engines is known to crack and fail due to prolonged exposure to hot coolant, often breaking in as few as 50,000 miles. This Four Seasons replacement provides a reliable solution to restore proper coolant flow and eliminate coolant leaks caused by a failed bypass pipe. Located deep on the front of the engine, this pipe is essential for maintaining proper cooling system function.