Dorman 667-644 Turbocharger Coolant Line - Supply

Turbocharger Coolant Line for Audi and Volkswagen

Dorman 667-644 is a turbocharger coolant line built to match the fit and function of the original line on select Audi and Volkswagen applications. It uses steel and rubber construction with a molded assembly shape for OE-style routing and dependable coolant transfer.

Compatible With 2001-2008 Audi A4, Supply; 2001-2005 Audi A4 Quattro, Supply; and 2001-2005 Volkswagen Passat, Supply. This Dorman 667-644 replacement is designed for vehicles that need a direct-fit turbo coolant line with factory-style banjo bolt hole connections.

Key Features

• Direct-fit turbocharger coolant line for select Audi A4, Audi A4 Quattro, and Volkswagen Passat models
• Steel and rubber construction for strength and flexibility
• Molded assembly shape supports OE-style routing
• Female end connections with banjo bolt hole inlet and outlet fittings
• Silver and black finish with steel fittings
• OEM grade replacement for factory-style service
• Part number 667-644 for application matching and catalog lookup

Detailed Description

This turbocharger coolant line is engineered to match the original line on specified vehicles, helping restore proper coolant flow to the turbocharger system. The molded steel/rubber design is sized with a 100 centerline length, 12 inside diameter, and 20 outside diameter, and it uses female ends with 14mm x 10 threaded fitting diameter at end 1. Dorman 667-644 is a practical OE-style replacement for turbocharged cooling circuits on Audi A4, Audi A4 Quattro, and Volkswagen Passat applications.

This part cross-references Rein CHT0576 for the same application.

What It Helps Address

• Coolant leaks from a cracked or deteriorated turbo coolant line
• Restricted coolant flow caused by damaged internal hose material
• Fitment issues from a bent or mismatched replacement line
• Connection problems at banjo bolt hole fittings
• Loss of OE routing after line corrosion or wear

Installation Notes and Tips

Verify vehicle year, make, model, and supply-side application before installation. Compare the original line length, fitting style, and end configuration to Dorman 667-644 before removal. Inspect adjacent turbocharger coolant components, sealing surfaces, and mounting points for wear or damage so the replacement line can seat correctly.

Quality Assurance

Dorman designs this coolant line to match original fit and function on the listed applications and manufactures it from quality materials for reliable performance and durability. Part number 667-644 is built as an OEM-grade replacement for service on the specified Audi and Volkswagen vehicles.