Gates 18749 HVAC Heater Hose

Gates Molded Heater Hose 18749

Gates 18749 is a molded heater hose built for tight engine bays where a straight hose will not route correctly. It uses EPDM construction and factory-molded shaping to support coolant, water, and air transfer in HVAC and cooling system service.

The Gates Molded Heater Hose line focuses on OEM-style routing for modern vehicles with compact packaging. This hose is also approved for marine applications and is a direct-fit style solution for applications such as Audi A6, Audi A6 Quattro, and Audi S6 heater inlet and heater outlet service.

Key Features

• EPDM construction for heater and coolant system use
• Factory-molded shape for tighter engine compartment routing
• End inside diameters: 16 mm (.62 in) and 19 mm (.75 in)
• Centerline length: 251 mm (9.9 in)
• Supports coolant, water, and air applications
• Approved for marine applications
• Gates 18749 molded heater hose for OEM-style replacement routing

Detailed Description

Gates 18749 is a molded coolant and heater hose made to match the routing needs of vehicles with limited clearance around the engine and HVAC plumbing. Its molded profile helps maintain the correct path between connection points, which is important when replacing a heater inlet or heater outlet hose on vehicles such as the Audi A6, Audi A6 Quattro, and Audi S6. The hose also cross-references Continental 63091 for the same application.

As part of the Gates Molded Heater Hose product line, this hose is built for OE-style fitment and serviceability in cooling and HVAC systems. The part number 18749 is commonly used where a formed hose is required instead of a universal cut-to-fit hose, including select Dodge Dakota, Toyota Pickup, and Isuzu I-Mark applications listed below.

What It Helps Fix

• Cracked or leaking heater hose connections
• Improper hose routing in tight engine compartments
• Coolant loss at heater inlet or heater outlet points
• Restricted service access caused by a worn molded hose
• Replacement needs for coolant, water, or air transfer lines

Installation Notes and Tips

Verify end diameters and centerline length before installation to confirm routing and connection match. For fitment-specific service, use the vehicle position listed for your application, such as heater inlet, heater outlet, heater to pipe-2, pipe to engine, or heater to pipe. This hose is listed for 2006-2011 Audi A6 heater inlet and heater outlet service, 2005-2011 Audi A6 Quattro heater inlet and heater outlet service, and 2007-2011 Audi S6 heater inlet and heater outlet service.

• Fits 2006-2011 Audi A6, Heater Inlet; Radiator and HVAC compatible coolant and heater hose; Molded Heater Hose
• Fits 2006-2011 Audi A6, Heater Outlet; Radiator and HVAC compatible coolant and heater hose; Molded Heater Hose
• Fits 2005-2011 Audi A6 Quattro, Heater Inlet; Radiator and HVAC compatible coolant and heater hose; Molded Heater Hose
• Fits 2005-2011 Audi A6 Quattro, Heater Outlet; Radiator and HVAC compatible coolant and heater hose; Molded Heater Hose
• Fits 2007-2011 Audi S6, Heater Inlet; Radiator and HVAC compatible coolant and heater hose; Molded Heater Hose
• Fits 2007-2011 Audi S6, Heater Outlet; Radiator and HVAC compatible coolant and heater hose; Molded Heater Hose
• Fits 2011 Ram Dakota, Heater Inlet; Molded Heater Hose
• Fits 2009-2010 Dodge Dakota, Heater Inlet; Molded Heater Hose
• Fits 2008 Dodge Dakota, Heater Inlet; Radiator and HVAC compatible coolant and heater hose; Molded Heater Hose
• Fits 1997-2000 Oldsmobile Silhouette, Heater To Pipe-2; Cut to fit for vehicles without auxiliary heater; Molded Heater Hose
• Fits 1999-2000 Pontiac Montana, Heater To Pipe-2; Cut to fit for vehicles without auxiliary heater; Molded Heater Hose
• Fits 1997-1999 Pontiac Trans Sport, Heater To Pipe-2; Cut to fit for vehicles without auxiliary heater; Molded Heater Hose
• Fits 1992-1994 Chevrolet Cavalier, Heater To Pipe-2; Molded Heater Hose
• Fits 1992-1994 Pontiac Sunbird, Heater To Pipe-2; Molded Heater Hose
• Fits 1991-1993 Chevrolet Corsica, Heater To Pipe-2; Molded Heater Hose
• Fits 1988-1991 Toyota 4Runner, Pipe To Engine; W/O Aux. Heater; Molded Heater Hose
• Fits 1991 Toyota Pickup, Pipe To Engine; W/O Aux. Heater; Molded Heater Hose
• Fits 1988-1989 Toyota Pickup, Pipe To Engine; W/O Aux. Heater; Molded Heater Hose
• Fits 1990 Toyota Pickup, Pipe To Engine; Molded Heater Hose
• Fits 1981-1984 Isuzu I-Mark, Heater To Pipe; Radiator and HVAC compatible coolant and heater hose; Molded Heater Hose

Quality Assurance

Gates is a recognized supplier of molded coolant and heater hose products for automotive and HVAC service. Part number 18749 is built to OE-style dimensions and routing requirements for the listed applications.