Molded Heater Hose
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CARQUEST by Dayco Molded Heater Hose

Part No. 87603 Warranty Details  

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This Dayco Small I.D. Molded Heater Hose is designed to replace OEM coolant hose and provide long, reliable service. The single molded configuration eliminates the need for multiple connections of hoses and clamps.

Product Features:
  • Made with a tough EPDM rubber compound this hose will resist the detrimental effects of heat, ozone and impacts from road debris
  • This hose meets SAE J20R4, Class D1 and SAE J1684 Type EC specifications
  • Highly resistant to electro-chemical degradation and premature stress cracking of the tube
  • The knitted polyester reinforcement provides high burst strength and resists degradation from temperature extremes and moisture
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Length:7 in


by PowerReviews
CARQUEST by DaycoMolded Heater Hose

(based on 1 review)

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Reviewed by 1 customer

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Direct replacement


from Saint Petersburg, FL

About Me Auto Enthusiast, Casual Driver, Truck Enthusiast

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3 or more reviews submitted


  • Durable
  • Easy To Install


    Best Uses

    • Everyday Driving
    • Replacement

    Comments about CARQUEST by Dayco Molded Heater Hose:

    Direct replacement for worn part, cheaper than the dealership.

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    Do you have questions about this product?


    Ask a question, get answers from real customers and in-house experts. For further assistance, please review your support options on our Contact Us page.

    1 Question | 1 Answer
    Displaying question 1
    • Q:

      Is this 3/4 inch inside diameter hose?
      Asked on 9/6/2012 by woofendog from Brossard, Quebec, CANADA

      1 answer



        The specification of this part Drive-Rite Molded Heater Hose, Part No. 303603 are: Length: 7 inches, Small ID A: 5/8 inches, Large ID B: 3/4 inches.
        For compatibility of this part with your vehicle, please provide your vehicle make, model and engine specification.
        For any further assistance, please feel free to call us at 1-877-238-2623 or visit your nearest Advance Auto Parts store and our representatives would be more than happy to assist you.

        Answered on 9/6/2012 by Aaron from AAP
    Displaying question 1

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