Dayco 87996 HVAC Heater Hose - Heater To Valve, Heater To Valve Inlet or Valve To Heater

Dayco Small I.D. Heater Hose 87996

Dayco 87996 is a Small I.D. Heater Hose built for HVAC heater circuit service where a dual inside diameter connection is required. Made from EPDM and finished in black, it provides a direct-fit hose solution for select BMW heater-to-valve and valve-to-heater applications.

Key Features

• EPDM construction for heater hose service
• Dual I.D. hose design with 11/16 in. end 1 inside diameter and 13/16 in. end 2 inside diameter
• Black finish for a clean OE-style appearance
• End 1 outside diameter: 1 in.; end 2 outside diameter: 1 1/16 in.
• Meets SAE J20R3 Class D-1 and SAE J1684 Type EC specifications
• Dayco part number 87996 for easy identification

Product Details

This Dayco Small I.D. Heater Hose line is built for HVAC hose routing where the heater circuit requires a stepped-diameter connection. The EPDM rubber construction is suited for coolant transfer in heater hose service, while the dual I.D. layout helps match the factory connection sizes used on select BMW 323Ci, 323i, 325Ci, 325i, 325xi, 328Ci, 328i, 330Ci, 330i, and 330xi models. If you are replacing a BMW heater hose at the heater valve inlet or valve-to-heater connection, Dayco 87996 provides the correct size profile for those applications.

This part cross-references no listed alternate part numbers in the provided data.

What It Is Used For

• Replacing a worn or cracked BMW heater hose
• Restoring coolant flow between the heater valve and heater core circuit
• Addressing coolant seepage at a small I.D. hose connection
• Correcting fitment issues caused by mismatched hose diameters
• Servicing HVAC heater hose routing on select BMW 3 Series models

Installation Notes and Tips

Verify the hose routing and end diameters before installation. This hose does not include a heat shield or protective sleeve, so inspect nearby components for clearance and heat exposure during service. Confirm the connection points match the listed heater-to-valve, heater-to-valve inlet, or valve-to-heater positions before final assembly.

Quality Assurance

Dayco 87996 is specified to SAE J20R3 Class D-1 and SAE J1684 Type EC standards, supporting consistent heater hose performance for the listed BMW applications.

Compatible BMW Applications

• Fits 2001-2006 BMW 325Ci, Heater To Valve
• Fits 2001-2006 BMW 330Ci, Heater To Valve Inlet
• Fits 2001-2005 BMW 325i, Heater To Valve Inlet
• Fits 2001-2005 BMW 325xi, Heater To Valve Inlet
• Fits 2001-2005 BMW 330i, Heater To Valve Inlet
• Fits 2001-2005 BMW 330xi, Heater To Valve Inlet
• Fits 2000 BMW 323Ci, Heater To Valve Inlet
• Fits 1999-2000 BMW 323i, Heater To Valve Inlet
• Fits 2000 BMW 328Ci, Valve To Heater
• Fits 1999-2000 BMW 328i, Valve To Heater