OE Quality
60-Day Returns

Dayco 87823 HVAC Heater Hose - Heater Outlet, Heater To Tee or Reservoir To Engine
Reliable HVAC Heater Hose for Acura, Honda, Mazda, and Saturn
The Dayco Small I.D. Heater Hose 87823 is engineered to meet the specific needs of select Acura, Honda, Mazda, and Saturn models. Designed with durable EPDM material and a dual inside diameter configuration, this hose ensures efficient heater core performance and long-lasting service.
Key Features of Dayco Small I.D. Heater Hose 87823
- Constructed from high-quality EPDM for heat and chemical resistance
- Dual inside diameters: 5/8 inch on one end and 3/4 inch on the other
- Black color with protective sleeve for added durability
- Complies with SAE J20R3 Class D-1 and SAE J1684 Type EC specifications
- Trunk height of 16 inches for precise fitment
- Compatible with multiple Acura, Honda, Mazda, and Saturn models
Detailed Description of the Small I.D. Heater Hose
The Dayco Small I.D. Heater Hose part number 87823 is part of the Small I.D. Heater Hose product line, which focuses on delivering hoses with smaller inside diameters tailored for specific HVAC applications. This hose features a dual inside diameter design, with one end measuring 5/8 inch and the other 3/4 inch, allowing for versatile connection points within the vehicle's heating system. Made from EPDM material, it offers resistance to heat, ozone, and coolant chemicals, ensuring durability under demanding engine compartment conditions. The hose includes a protective sleeve to guard against abrasion and wear, although it does not contain a heat shield. Meeting SAE J20R3 Class D-1 and SAE J1684 Type EC standards, it adheres to industry requirements for heater hoses.
Applications and Common Issues Addressed
- Replacement of worn or cracked heater hoses in Acura Accord, Honda Crosstour, Mazda L300, and Saturn LS2 models
- Prevention of coolant leaks that can cause engine overheating
- Restoration of proper heater core flow for effective cabin heating
- Mitigation of hose degradation due to heat and chemical exposure
- Ensuring secure connections with dual inside diameter ends for specific HVAC configurations
Installation Notes and Tips
When installing the Dayco Small I.D. Heater Hose 87823, verify the correct orientation of the dual inside diameter ends to match the vehicle’s heater core and engine connections. Inspect hose clamps and replace if necessary to ensure a secure, leak-free fit. The protective sleeve should be positioned to minimize abrasion from surrounding components. Always drain the cooling system before removal and refill with the appropriate coolant after installation.
Quality Assurance and Warranty
Dayco manufactures the Small I.D. Heater Hose 87823 to meet strict SAE specifications, ensuring reliable performance in HVAC systems. The EPDM material and protective sleeve contribute to the hose’s durability and resistance to common failure modes. While specific warranty details are not provided, Dayco products typically adhere to industry standards for quality and reliability.
| Brand | Dayco |
| Part Number | 87823 |
| Position | Small I.D. Heater Hose, Heater Outlet, Reservoir To Engine, and Heater To Tee |
| Material | Epdm |
| Color | Black |
| End 1 Inside Diameter | 5/8 |
| End 2 Inside Diameter | 3/4 |
| Contains Heat Shield | N |
| Contains Protective Sleeve | Y |
| Hose Type | Dual i.d. hose |
| SAE Specification | Sae j20r3 class d-1, sae j1684 type ec |
| Trunk Height | 16 |
This part fits 29 vehicles. Search below:
| Year | Make | Model | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|
| 2015 | Honda | Crosstour | 2.4L | L4 | Heater Outlet | Small I.D. Heater Hose |
| 2014 | Acura | TSX | 2.4L | L4 | Heater Outlet | Small I.D. Heater Hose |
| 2014 | Honda | Crosstour | 2.4L | L4 | Heater Outlet | Small I.D. Heater Hose |
| 2013 | Acura | TSX | 2.4L | L4 | Heater Outlet | Small I.D. Heater Hose |
| 2013 | Honda | Crosstour | 2.4L | L4 | Heater Outlet | Small I.D. Heater Hose |
| 2012 | Acura | TSX | 2.4L | L4 | Heater Outlet | Small I.D. Heater Hose |
| 2012 | Honda | Accord | 2.4L | L4 | Heater Outlet | Small I.D. Heater Hose |
| 2012 | Honda | Crosstour | 2.4L | L4 | Heater Outlet | Small I.D. Heater Hose |
| 2011 | Acura | TSX | 2.4L | L4 | Heater Outlet | Small I.D. Heater Hose |
| 2011 | Honda | Accord | 2.4L | L4 | Heater Outlet | Small I.D. Heater Hose |
| 2010 | Honda | Accord | 2.4L | L4 | Heater Outlet | Small I.D. Heater Hose |
| 2009 | Mazda | 3 | 2.0L | L4 | Heater To Tee | Small I.D. Heater Hose |
| 2009 | Mazda | 3 | 2.3L | L4 | Heater To Tee | Small I.D. Heater Hose |
| 2008 | Mazda | 3 | 2.0L | L4 | Heater To Tee | Small I.D. Heater Hose |
| 2008 | Mazda | 3 | 2.3L | L4 | Heater To Tee | Small I.D. Heater Hose |
| 2007 | Mazda | 3 | 2.0L | L4 | Heater To Tee | Small I.D. Heater Hose |
| 2007 | Mazda | 3 | 2.3L | L4 | Heater To Tee | Small I.D. Heater Hose |
| 2006 | Mazda | 3 | 2.0L | L4 | Heater To Tee | Small I.D. Heater Hose |
| 2006 | Mazda | 3 | 2.3L | L4 | Heater To Tee | Small I.D. Heater Hose |
| 2005 | Mazda | 3 | 2.0L | L4 | Heater To Tee | Small I.D. Heater Hose |
| 2005 | Mazda | 3 | 2.3L | L4 | Heater To Tee | Small I.D. Heater Hose |
| 2005 | Saturn | L300 | Reservoir To Engine | Small I.D. Heater Hose | ||
| 2004 | Mazda | 3 | 2.0L | L4 | Heater To Tee | Small I.D. Heater Hose |
| 2004 | Mazda | 3 | 2.3L | L4 | Heater To Tee | Small I.D. Heater Hose |
| 2004 | Saturn | L300 | 3.0L | V6 | Reservoir To Engine | Small I.D. Heater Hose |
| 2003 | Saturn | L300 | Reservoir To Engine | Small I.D. Heater Hose | ||
| 2003 | Saturn | LW300 | Reservoir To Engine | Small I.D. Heater Hose | ||
| 2000 | Saturn | LS2 | Reservoir To Engine | Small I.D. Heater Hose | ||
| 2000 | Saturn | LW2 | Reservoir To Engine | Small I.D. Heater Hose |
* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
This part directly replaces or is cross-referenced with the following part numbers:
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.