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Part #: 88451

Dayco 88451 HVAC Heater Hose

Small I.D. Heater Hose, Tee To Reservoir
⚙️ 49 vehicles fit this part
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OE Direct Replacement — Bolt-on fit, no modifications needed
📦Small I.D. Heater Hose, Tee To Reservoir
🚗Fitment: Mazda, Ford, Mercury, Suzuki, and Chevrolet, 3, 3 Sport, Escape, Tribute, Mariner, Forenza, Reno, Optra, Taurus, and Sable
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Overview of Dayco Small I.D. Heater Hose 88451

The Dayco Small I.D. Heater Hose 88451 is designed for reliable HVAC system performance in select Ford, Mazda, Mercury, and Suzuki vehicles. Engineered with durable EPDM material, this hose ensures consistent heat transfer and resistance to automotive fluids.

  • Constructed from high-quality EPDM for heat and chemical resistance
  • Black single inside diameter hose with 3/4 inch ID on both ends
  • Meets SAE J20R3 Class D-1 and SAE J1684 Type EC specifications
  • Compatible with multiple Ford, Mazda, Mercury, and Suzuki models
  • Part of Dayco's Small I.D. Heater Hose product line for HVAC applications

Detailed Product Description

The Dayco Small I.D. Heater Hose 88451 is a single inside diameter hose measuring 3/4 inch on both ends, designed specifically for HVAC heater systems. Made from EPDM (ethylene propylene diene monomer) rubber, it offers excellent resistance to heat, ozone, and automotive fluids, ensuring durability and long service life. This hose does not include a heat shield or protective sleeve, making it suitable for applications where such features are not required. It complies with SAE J20R3 Class D-1 and SAE J1684 Type EC standards, confirming its suitability for automotive heating and cooling systems.

The Small I.D. Heater Hose product line by Dayco focuses on providing precise fitment and reliable performance for smaller diameter heater hoses used in vehicle HVAC systems. This line is engineered to meet OEM specifications, ensuring compatibility and durability in demanding automotive environments.

Compatible Vehicles and Applications

This heater hose is compatible with a range of vehicles including Ford Escape, Ford Taurus, Ford Sable, Mazda 3 and 3 Sport, Mercury Mariner, Suzuki Forenza, and Tribute models. The Dayco 88451 heater hose is designed to maintain proper coolant flow within the HVAC system, supporting effective cabin heating and defrosting functions.

  • Replacement for worn or cracked heater hoses in HVAC systems
  • Resolves coolant leaks causing heater core inefficiency
  • Prevents overheating issues related to restricted coolant flow
  • Addresses hose swelling or softening due to age or chemical exposure
  • Restores proper heater core performance in compatible Ford, Mazda, Mercury, and Suzuki models

Installation Notes and Tips

When installing the Dayco Small I.D. Heater Hose 88451, ensure the engine is cool and the cooling system is depressurized. Verify the hose diameter matches the vehicle’s specifications (3/4 inch ID). Inspect hose connections and clamps for wear and replace if necessary to prevent leaks. Proper routing without kinks or sharp bends will maintain optimal coolant flow and heater performance.

Quality Assurance and Warranty

Dayco manufactures the Small I.D. Heater Hose 88451 to meet stringent SAE standards, ensuring consistent quality and durability. While specific warranty details are not provided, Dayco products typically adhere to industry quality controls and are backed by the brand’s commitment to automotive component reliability.

BrandDayco
Part Number88451
PositionSmall I.D. Heater Hose, Tee To Reservoir
ColorBlack
End 1 Inside Diameter3/4
End 2 Inside Diameter3/4
Hose TypeSingle I.D. Hose
MaterialEPDM
SAE SpecificationSAE J20R3 Class D-1, SAE J1684 Type EC
Trunk Height17

This part fits 49 vehicles. Search below:

YearMakeModelLitersCylindersFuel TypePositionNotes
2013Mazda32.5LL4Tee To ReservoirSmall I.D. Heater Hose
2013Mazda32.3LL4Tee To ReservoirSmall I.D. Heater Hose
2013Mazda3 Sport2.5LL4Tee To ReservoirSmall I.D. Heater Hose
2012FordEscape3.0LV6Coolant ReservoirSmall I.D. Heater Hose
2012Mazda32.5LL4Tee To ReservoirSmall I.D. Heater Hose
2012Mazda32.3LL4Tee To ReservoirSmall I.D. Heater Hose
2012Mazda3 Sport2.5LL4Tee To ReservoirSmall I.D. Heater Hose
2011Mazda32.5LL4Tee To ReservoirSmall I.D. Heater Hose
2011Mazda32.3LL4Tee To ReservoirSmall I.D. Heater Hose
2010FordEscape2.5LL4GASCoolant ReservoirSmall I.D. Heater Hose
2010Mazda32.3LL4Tee To ReservoirSmall I.D. Heater Hose
2010MazdaTribute2.5LL4GASCoolant ReservoirSmall I.D. Heater Hose
2010MercuryMariner2.5LL4GASCoolant ReservoirSmall I.D. Heater Hose
2009FordEscape2.5LL4GASCoolant ReservoirSmall I.D. Heater Hose
2009MazdaTribute2.5LL4GASCoolant ReservoirSmall I.D. Heater Hose
2009MercuryMariner2.5LL4GASCoolant ReservoirSmall I.D. Heater Hose
2008FordEscape2.3LL4GASCoolant ReservoirSmall I.D. Heater Hose
2008FordEscape3.0LV6Coolant ReservoirSmall I.D. Heater Hose
2008MazdaTribute2.3LL4GASCoolant ReservoirSmall I.D. Heater Hose
2008MazdaTribute3.0LV6Coolant ReservoirSmall I.D. Heater Hose
2008MercuryMariner2.3LL4GASCoolant ReservoirSmall I.D. Heater Hose
2008MercuryMariner3.0LV6Coolant ReservoirSmall I.D. Heater Hose
2008SuzukiForenzaTee To EngineSmall I.D. Heater Hose
2007FordEscape2.3LL4GASCoolant ReservoirSmall I.D. Heater Hose
2007FordEscape3.0LV6Coolant ReservoirSmall I.D. Heater Hose
2007MercuryMariner2.3LL4GASCoolant ReservoirSmall I.D. Heater Hose
2007MercuryMariner3.0LV6Coolant ReservoirSmall I.D. Heater Hose
2007SuzukiForenzaTee To EngineSmall I.D. Heater Hose
2006FordEscape2.3LL4GASCoolant ReservoirSmall I.D. Heater Hose
2006FordEscape3.0LV6Reservoir To Upper RadiatorSmall I.D. Heater Hose
2006MazdaTribute2.3LL4Coolant ReservoirSmall I.D. Heater Hose
2006MazdaTribute3.0LV6Coolant ReservoirSmall I.D. Heater Hose
2006MercuryMariner2.3LL4GASCoolant ReservoirSmall I.D. Heater Hose
2006MercuryMariner3.0LV6Coolant ReservoirSmall I.D. Heater Hose
2006SuzukiForenzaTee To EngineSmall I.D. Heater Hose
2005FordEscape2.3LL4GASCoolant ReservoirSmall I.D. Heater Hose
2005FordEscape3.0LV6Reservoir To Upper RadiatorSmall I.D. Heater Hose
2005MazdaTribute2.3LL4Coolant ReservoirSmall I.D. Heater Hose
2005MazdaTribute3.0LV6Coolant ReservoirSmall I.D. Heater Hose
2005MercuryMariner2.3LL4Coolant ReservoirSmall I.D. Heater Hose
2005MercuryMariner3.0LV6Coolant ReservoirSmall I.D. Heater Hose
2005SuzukiForenzaTee To EngineSmall I.D. Heater Hose
2004SuzukiForenzaTee To EngineSmall I.D. Heater Hose
2002FordTaurus3.0LV6Pipe To Water PumpSmall I.D. Heater Hose
2002MercurySable3.0LV6Pipe To Water PumpSmall I.D. Heater Hose
2001FordTaurus3.0LV6Pipe To Water PumpSmall I.D. Heater Hose
2001MercurySable3.0LV6Pipe To Water PumpSmall I.D. Heater Hose
2000FordTaurus3.0LV6Pipe To Water PumpSmall I.D. Heater Hose
2000MercurySable3.0LV6Pipe To Water PumpSmall 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:

16303M

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.