Rein CHU0681 Engine Coolant Pipe - Auxiliary Water Pump Hose To Expansion Tank Hose

OE-Style Coolant Pipe for European Vehicles

The Rein CHU0681 engine coolant pipe is an OE-quality replacement for European cooling systems that use a metal connector between the auxiliary water pump hose and the expansion tank hose. Built from steel, this coolant pipe is made for direct replacement service on Audi and Volkswagen applications. Part number CHU0681 is a practical choice when replacing a worn, corroded, or leaking coolant pipe.

Key Features

• Steel construction for cooling-system durability
• Direct replacement coolant pipe for OE-style service
• Designed for the auxiliary water pump hose to expansion tank hose connection
• No gasket or seal included
• Cross-references Genuine 1K0121070BD for the same application

Detailed Description

Rein Automotive coolant pipes are built to match the original fit and function expected in European vehicles. This CHU0681 engine coolant pipe is engineered for the auxiliary water pump hose to expansion tank hose connection and is listed for Audi Q3, Audi Q3 Quattro, Volkswagen Tiguan Limited, Volkswagen CC, Volkswagen Tiguan, Volkswagen Eos, Audi TT Quattro, Volkswagen GTI, Audi A3, Audi A3 Quattro, Volkswagen Beetle, Volkswagen Golf, Volkswagen Jetta, Audi TT, Volkswagen Passat, and Volkswagen Passat CC. If you are servicing a cooling-system leak on an Audi A3 coolant pipe or a Volkswagen Tiguan coolant pipe application, this part number CHU0681 provides the correct OE-style replacement path.

What It Helps Address

• Coolant seepage at the auxiliary water pump hose connection
• Cracked or corroded metal coolant pipe sections
• Loss of coolant from a damaged expansion tank hose connection
• Cooling-system service on vehicles with a metal connector
• Replacement of a failed OE-style coolant pipe assembly

Installation Notes and Tips

• Verify the vehicle uses the auxiliary water pump hose to expansion tank hose layout with a metal connector.
• Inspect adjoining hoses and clamps before installation.
• No gasket or seal is included, so reuse or replacement of related sealing components must be confirmed separately.
• Confirm fitment by year, make, model, and connection style before ordering CHU0681.

Quality Assurance

Rein positions this coolant pipe as an OE-quality replacement for European vehicles, with fit and function aligned to the original design. Part number CHU0681 is built as a direct replacement for the specified cooling-system application.