Dayco 87821 HVAC Heater Hose - Heater Outlet or Heater To Pipe

Dayco Small I.D. Heater Hose 87821

Dayco 87821 is a Small I.D. Heater Hose built for heater circuit service in select Toyota and Lexus applications. It uses EPDM construction with a black finish, a 5/8 in. inside diameter at both ends, and a protective sleeve for added abrasion resistance in routed installations.

Key Features

• EPDM heater hose construction for coolant transfer in HVAC systems
• 5/8 in. inside diameter at both ends for small I.D. heater hose routing
• Protective sleeve included for added protection in contact-prone areas
• Black hose appearance for OE-style service replacement
• Meets SAE J20R3 Class D-1 and SAE J1684 Type EC specifications
• Dayco 87821 cross-references ACDelco 16260M and Gates 18027 for the same application

Product Line Details

Dayco’s Small I.D. Heater Hose line is built for heater outlet and heater-to-pipe routing where a compact hose diameter is required. This hose is sized for direct replacement use in vehicles that call for a 5/8 in. heater hose, including Toyota Camry, Toyota Avalon, Toyota Solara, Toyota Highlander, Lexus ES330, and Lexus ES300 applications listed below.

Detailed Description

Dayco 87821 is an HVAC heater hose made from EPDM, a material commonly used in coolant hose service for its resistance to heat and coolant exposure. The hose is specified as a single I.D. hose with matching 5/8 in. ends, and the protective sleeve adds an extra layer where the hose passes near brackets, clips, or other contact points. It is a direct service part for heater outlet and heater-to-pipe locations on select Toyota and Lexus models, including Toyota Camry and Lexus ES330 applications.

Vehicle Fitment

• Fits 2008-2013 Toyota Highlander, Heater Outlet, without auxiliary heater; Small I.D. Heater Hose
• Fits 2004-2008 Toyota Solara, Heater Outlet, Small I.D. Heater Hose
• Fits 2004-2006 Lexus ES330, Heater Outlet, Small I.D. Heater Hose
• Fits 1997-2006 Toyota Camry, Heater To Pipe, Small I.D. Heater Hose
• Fits 2004-2006 Toyota Camry, Heater Outlet, Small I.D. Heater Hose
• Fits 2002-2004 Toyota Avalon, Heater To Pipe, Small I.D. Heater Hose
• Fits 2002-2003 Lexus ES300, Heater Outlet, Small I.D. Heater Hose

Common Service Uses

• Replacing a cracked or heat-aged heater hose
• Restoring coolant flow between the heater outlet and pipe
• Addressing seepage at a worn hose connection
• Repairing a hose with abrasion damage at a routed contact point
• Servicing a 5/8 in. heater hose on Toyota Camry, Toyota Avalon, or Lexus ES330 applications

Installation Notes

Verify the hose path, end size, and position before installation. This part is specified for heater outlet and heater-to-pipe locations, so confirm the routing matches the vehicle’s original layout. Inspect adjoining clamps, pipes, and fittings for wear or corrosion before installing Dayco 87821.

Quality Assurance

Dayco 87821 is built to SAE J20R3 Class D-1 and SAE J1684 Type EC specifications for heater hose service. The EPDM construction and protective sleeve support dependable use in coolant and HVAC routing on the listed Toyota and Lexus applications.