Dayco 86815 Engine Coolant Hose

Dayco Small I.D. Heater Hose 86815

Dayco 86815 is a small inside diameter engine coolant hose built for throttle body coolant routing on a range of import and domestic applications. Made from EPDM and finished in black, it provides a direct-fit replacement for vehicles that use a 9/32-inch hose connection at each end.

This Dayco Small I.D. Heater Hose line is focused on compact coolant transfer points where standard heater hose sizes do not apply. For service work on Toyota Corolla, Toyota Matrix, Hyundai Elantra, and Kia Spectra applications, the 86815 offers the correct small-diameter configuration for throttle body inlet and outlet connections.

• EPDM construction for coolant-system service
• Black hose finish
• 9/32-inch inside diameter at both ends
• Single I.D. hose design
• Meets SAE J20R3 Class D-1 and SAE J1684 Type EC specifications
• Fits throttle body coolant routing applications across multiple makes and models

Fitment and Application Details

Compatible With 2005-2010 Kia Sportage, To Throttle Body; 2005-2009 Hyundai Tucson, To Throttle Body; 2004-2009 Kia Spectra, To Throttle Body; 2005-2009 Kia Spectra5, To Throttle Body; 2003-2008 Hyundai Tiburon, To Throttle Body; 2003-2008 Pontiac Vibe, Throttle Body Inlet; 2003-2008 Toyota Corolla, Throttle Body To Pipe; 2003-2008 Toyota Matrix, Throttle Body To Pipe; 2001-2006 Hyundai Elantra, To Throttle Body; 2002-2005 Hyundai XG350, Throttle Body Housing Outlet; 2000-2005 Mitsubishi Eclipse, Throttle Body Outlet; 1999-2003 Mitsubishi Galant, Throttle Body Outlet; 2000-2001 INFINITI I30, Pipe To Throttle Body; and 2000-2001 Nissan Maxima, Pipe To Throttle Body. Additional coverage includes 1994-2002 Dodge Ram 2500 and Dodge Ram 3500 applications marked N/A in the fitment data.

This part cross-references Gates 18124 and NAPA 10124 for the same application.

What This Hose Helps Address

• Cracked or hardened throttle body coolant hose
• Coolant seepage at a small-diameter hose connection
• Incorrect hose size during throttle body service
• Heat-related hose deterioration in the coolant circuit
• Replacement needs on Toyota Corolla, Toyota Matrix, and Hyundai Elantra throttle body lines

Installation Notes

Verify the hose routing, end diameter, and connection points before installation. This hose uses a 9/32-inch inside diameter at both ends and is intended for throttle body coolant passages, so match the original path and length requirements to the vehicle application. Inspect adjoining fittings and clamps for wear before completing service.

Quality Assurance

Dayco manufactures this hose to SAE J20R3 Class D-1 and SAE J1684 Type EC specifications for coolant-system use. The EPDM material is selected for engine cooling service where temperature and coolant exposure are part of normal operation.