Dayco 88455 HVAC Heater Hose - Heater Outlet, Heater To Pipe or Heater To Valve

Dayco Small I.D. Heater Hose 88455

Dayco 88455 is a Small I.D. Heater Hose built for heater circuit service in select Audi, Saturn, and Volkswagen applications. It uses EPDM construction and a black finish, with 3/4-inch inside diameter ends and SAE J20R3 Class D-1 and SAE J1684 Type EC compliance for heater hose applications.

Key Features

• EPDM heater hose construction for coolant transfer in HVAC systems
• 3/4-inch inside diameter at both ends
• Black single I.D. hose design
• Outside diameter: 1 3/32 inches at each end
• Meets SAE J20R3 Class D-1 and SAE J1684 Type EC specifications
• Dayco Small I.D. Heater Hose line for direct-fit heater hose service

Product Details

The Dayco Small I.D. Heater Hose line focuses on heater hose routing where a smaller inside diameter is required for proper coolant flow and connection fitment. Part number 88455 is a direct replacement heater hose for applications such as 1997-2001 Audi A4 heater to pipe, 1997-1999 Audi A4 Quattro heater to pipe, 2001 Audi A4 Quattro heater outlet, 2001-2002 Saturn L300 heater to valve, 2001-2002 Saturn LW300 heater to valve, 2000 Saturn LS2 heater to valve, 2000 Saturn LW2 heater to valve, 2003-2005 Saturn L300 heater to pipe, 2003 Saturn LW300 heater to pipe, and 1998-2005 Volkswagen Passat heater to pipe. This part cross-references Gates 19735 for the same application.

What It Helps Address

• Cracked or hardened heater hose material
• Coolant seepage at heater hose connections
• Restricted heater coolant flow from deteriorated hose walls
• Improper fit at 3/4-inch heater hose connections
• Service replacement for heater to pipe, heater to valve, and heater outlet routing

Installation Notes

Verify the hose routing, end diameter, and connection points before installation. This hose is intended for heater circuit use where a 3/4-inch inside diameter is specified, including Audi A4 and A4 Quattro, Saturn L300, LW300, LS2, LW2, and Volkswagen Passat applications. Confirm the vehicle year, model, and position against the fitment listing before ordering.

Quality Assurance

Dayco manufactures this heater hose to SAE J20R3 Class D-1 and SAE J1684 Type EC specifications, supporting consistent material and dimensional requirements for HVAC hose service.