HomeHVAC > Hoses and PipesDayco 80394 HVAC Heater Hose
Part #: 80394

Dayco 80394 HVAC Heater Hose

Pipe To Water Pump
⚙️ 94 vehicles fit this part
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Select your vehicle to confirm fitment
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OE Direct Replacement — Bolt-on fit, no modifications needed
🚗Fitment: Suzuki, Toyota, Chevrolet, Isuzu, Honda, Mazda, Pontiac, and Geo, XL-7, Sienna, Grand Vitara, Tracker, Axiom, Rodeo, Vitara, Rodeo Sport, Passport, Trooper, Metro, VehiCROSS, Swift, Amigo, Millenia, Firefly, Sidekick, Sunrunner, Prelude, Accord, and Land Cruiser
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Reliable HVAC Heater Hose for Select Vehicles

The Dayco 80394 HVAC heater hose is designed to provide dependable performance for a range of vehicles including Honda Accord, Toyota Land Cruiser, and Suzuki Grand Vitara. Engineered to meet OEM specifications, this heater hose ensures efficient coolant flow within the heating system.

  • Compatible with Chevrolet, Geo, Honda, Isuzu, Mazda, Pontiac, Suzuki, and Toyota models
  • Direct replacement part number 80394 for precise fitment
  • Constructed to withstand high temperatures and pressure in HVAC systems
  • Durable material resists cracking, swelling, and leaks
  • Designed for use in heater core coolant circulation

Durable Construction and Precise Fitment

The Dayco 80394 heater hose is manufactured to meet strict quality standards, ensuring a secure and leak-free connection in the HVAC system. This hose is engineered to handle the thermal and mechanical stresses typical in vehicles such as the Honda Accord and Toyota Land Cruiser. Its compatibility with multiple makes and models, including the Suzuki Grand Vitara and Mazda Millenia, makes it a versatile replacement part. The hose maintains coolant flow to the heater core, supporting cabin heating functionality and overall HVAC system efficiency.

Applications and Common Issues Addressed

  • Replacement for cracked or leaking heater hoses in Honda Accord and Toyota Land Cruiser
  • Solves coolant leaks causing reduced heating performance
  • Prevents overheating issues related to compromised heater hoses
  • Restores proper coolant circulation in Suzuki Grand Vitara and Mazda Millenia HVAC systems
  • Addresses hose swelling or brittleness from age and heat exposure

Installation Notes and Tips

  • Ensure the engine is cool before removing the old heater hose
  • Inspect hose clamps and replace if corroded or damaged
  • Verify correct routing to avoid kinks or interference with other components
  • Use appropriate coolant type and refill to recommended levels after installation
  • Check for leaks after installation by running the engine and heater system

Quality Assurance and Warranty Information

Dayco manufactures the 80394 heater hose to meet or exceed OEM standards, providing reliable service life under normal operating conditions. While specific warranty details may vary, Dayco products typically come with a limited warranty covering defects in materials and workmanship. This ensures confidence in the durability and performance of the heater hose for vehicles such as the Honda Accord, Toyota Land Cruiser, and Suzuki Grand Vitara.

This part fits 94 vehicles. Search below:

YearMakeModelTransmissionLitersCylindersFuel TypePositionNotes
2006SuzukiXL-7Pipe To Water Pump
2006ToyotaSiennaTee To Pipe
2006ToyotaSiennaAuxiliary Heater Pipe To Auxiliary Heater
2005SuzukiGrand VitaraPipe To Engine
2005SuzukiXL-7Pipe To Water Pump
2005ToyotaSiennaTee To Pipe
2005ToyotaSiennaAuxiliary Heater Pipe To Auxiliary Heater
2004ChevroletTracker2.5LV6Heater Outlet (Front)
2004IsuzuAxiomN/A
2004IsuzuRodeo3.2LV6N/A
2004IsuzuRodeo3.5LV6N/A
2004SuzukiGrand VitaraPipe To Engine
2004SuzukiVitaraPipe To Engine
2004SuzukiVitaraHeater To Pipe
2004SuzukiXL-7Pipe To Engine
2004ToyotaSiennaTee To Pipe
2004ToyotaSiennaAuxiliary Heater Pipe To Auxiliary Heater
2003ChevroletTracker2.5LV6Pipe To Thermostat
2003IsuzuAxiomN/A
2003IsuzuRodeo3.2LV6N/A
2003IsuzuRodeo Sport3.2LV6N/A
2003SuzukiGrand VitaraPipe To Engine
2003SuzukiVitaraHeater Inlet
2003SuzukiVitaraHeater To Pipe
2003SuzukiXL-7Pipe To Engine
2002ChevroletTracker2.5LV6Heater Outlet (Front)
2002HondaPassportN/A
2002IsuzuAxiomN/A
2002IsuzuRodeo3.2LV6N/A
2002IsuzuRodeo Sport3.2LV6N/A
2002IsuzuTrooperN/A
2002SuzukiVitara2.0LL4Heater Inlet
2002SuzukiVitara2.0LL4Heater To Pipe
2001ChevroletMetroHeater To Pipe
2001HondaPassportN/A
2001IsuzuRodeo3.2LV6N/A
2001IsuzuTrooperN/A
2001IsuzuVehiCROSSN/A
2001SuzukiSwiftHeater To Pipe
2001SuzukiVitara2.0LL4Heater Inlet
2001SuzukiVitara2.0LL4Heater To Pipe
2000ChevroletMetroAutomatic1.3LL4Heater To Pipe
2000HondaPassportN/A
2000IsuzuAmigo3.2LV6Upper
2000IsuzuRodeo3.2LV6N/A
2000IsuzuTrooperN/A
2000IsuzuVehiCROSSN/A
2000MazdaMillenia2.3LV6Reservoir To Thermostat
2000PontiacFireflyAutomatic1.3LL4GASHeater To Pipe
2000SuzukiSwiftHeater Outlet
2000SuzukiVitara2.0LL4Heater Inlet
2000SuzukiVitara2.0LL4Heater To Pipe
1999ChevroletMetroAutomatic1.3LL4Heater To Pipe
1999HondaPassportN/A
1999IsuzuAmigo3.2LV6Upper
1999IsuzuRodeo3.2LV6N/A
1999IsuzuTrooperN/A
1999IsuzuVehiCROSSN/A
1999PontiacFireflyAutomatic1.3LL4Heater To Pipe
1999SuzukiSwiftHeater Outlet
1999SuzukiVitara2.0LL4Heater Inlet
1999SuzukiVitara2.0LL4Heater To Pipe
1998ChevroletMetroAutomatic1.3LL4Heater To Pipe
1998ChevroletTrackerPipe To PipeCurved
1998HondaPassportN/A
1998IsuzuRodeo3.2LV6N/A
1998IsuzuTrooperN/A
1998PontiacFireflyAutomatic1.3LL4Heater To Pipe
1998SuzukiSidekick1.6LL4Pipe To PipeCurved
1998SuzukiSwiftHeater Outlet
1997GeoMetroAutomatic1.3LL4Heater Outlet
1997GeoTrackerHeater Hose
1997PontiacFireflyAutomatic1.3LL4Heater Outlet
1997PontiacSunrunnerHeater Hose
1996GeoMetroAutomatic1.3LL4Heater Outlet
1996GeoTrackerHeater Hose
1996PontiacFireflyAutomatic1.3LL4Heater Outlet
1996PontiacSunrunnerHeater Hose
1996SuzukiSidekick1.6LL4Heater Hose
1995GeoMetroAutomatic1.3LL4Heater Outlet
1995GeoTrackerHeater Hose
1995PontiacFireflyAutomatic1.3LL4Heater Outlet
1995PontiacSunrunnerHeater Hose
1995SuzukiSidekickHeater Inlet
1994SuzukiSidekickHeater Inlet
1993SuzukiSidekickHeater Inlet
1992SuzukiSidekickHeater Inlet
1990HondaPrelude2.0LL4N/A
1989HondaAccordOutlet
1989HondaPreludeN/A
1988HondaPreludeN/A
1983ToyotaLand Cruiser4.2LL6Pipe To Auxiliary Heater
1982ToyotaLand Cruiser4.2LL6Pipe To Auxiliary Heater
1981ToyotaLand Cruiser4.2LL6Pipe To Auxiliary Heater

* 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:

14064S14242S16197M

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