Audi A6/Allroad Turbo Coolant Return Hose / Line 078121491E

OEM Part #: 078-121-491-E (078121491E)

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The Turbo Coolant Return Hose (OEM Part 078121491G) is designed for optimal fit and performance in Audi Allroad Quattro (2001-2005) and A6 Quattro (2002-2004) models. This factory-original part channels coolant from the turbocharger back to the engine, ensuring efficient cooling and preventing overheating. Replacing a worn or damaged hose can resolve common issues like coolant leaks or turbo performance loss. This part is a direct replacement, providing a seamless integration that restores factory functionality. Also compatible with part number 078121491E, it is the ideal solution for maintaining your vehicle's turbo system.

Specifications

Specifications for Turbo Coolant Return Hose / Line 078121491E
Fits Vehicle ModelA6, Allroad
Fits Vehicle MakeAudi
OEM Part No078-121-491-E (078121491E)
Compatible OEM Part No 078-121-491-G
CategoryTurbo / Supercharger

Compatible Vehicles

Fits 8 vehicle configurations across 1 make, 2001-2005.

Check your specific vehicle before ordering. This list shows year, make, and model. Some years have multiple trims or engines that use different parts, and individual listings may have additional fitment notes (e.g. “with sunroof only”). Review the full variant list below, or message us with your VIN and we’ll confirm the match.

Audi

  • A6 2002-2004 · 3 variants
  • Allroad 2001-2005 · 5 variants
View all 8 vehicle configurations
Full vehicle fitment list for Turbo Coolant Return Hose / Line 078121491E
Year Make Model Trim Engine Note
2001 Audi Allroad Quattro Wagon 2.7L V6 Turbo
2002 Audi A6 Quattro Sedan 2.7L V6 Turbo
2002 Audi Allroad Quattro Wagon 2.7L V6 Turbo
2003 Audi A6 Quattro Sedan 2.7L V6 Turbo
2003 Audi Allroad Quattro Wagon 2.7L V6 Turbo
2004 Audi A6 Quattro Sedan 2.7L V6 Turbo
2004 Audi Allroad Quattro Wagon 2.7L V6 Turbo
2005 Audi Allroad Quattro Wagon 2.7L V6 Turbo

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Asking about: Turbo Coolant Return Hose / Line 078121491E · OEM #078121491E