1974 Mazda RX-4 Heater Hoses

Keep Your 1974 Mazda RX-4 in Top Shape with a Quality Heater Hose

When it comes to maintaining or upgrading your 1974 Mazda RX-4, choosing high-quality parts is crucial for ensuring your vehicle stays in top shape, whether you’re tackling a repair or enhancing performance. At Advance Auto Parts, we know how important it is to find the right Heater Hose for your RX-4. We currently carry a top Heater Hose in stock that is built to last. Whether you’re replacing a damaged Heater Hose or looking to upgrade, our selection for the 1974 Mazda RX-4 ensures you’ll find exactly what you need to keep your vehicle looking and performing its best.

Explore Related Parts

And while you’re here, don’t forget to check out related part categories like Oil Cooler Hoses and Serpentine and V Belts to complete your upgrade or repair project. At Advance Auto Parts, we’re proud to offer the parts and expertise to keep your 1974 Mazda RX-4 running smoothly and looking great.

Essential 1974 Mazda RX-4 Heater Hoses

Dayco – Molded Heater Hose; EPDM Rubber, 5/8 Inch Diameter, 18 Inch Length (Part No.80402)

Molded Heater Hose; EPDM Rubber, 5/8 Inch Diameter, 18 Inch Length

from

$23.99
Providing reliable service in applications requiring molded hoses, the Dayco heater hose is designed to replace OEM coolant hoses. Made with the same bends and routing as the original assembly, this molded hose is meant to fit the vehicle precisely. The knitted reinforcement and synthetic EPDM construction provide high-strength performance and resistance to detrimental environmental elements, coolants and temperature variations of -40°F (-40°C) to +257°F (+125°C) and the “quick connect” end allows for fast, convenient installation.

Product Features:
  • Meets the requirements of SAE J20R3, Class D-1
  • Designed to meet Type EC electro-chemical requirements as specified in SAE J1684, which prevents inner tube deterioration caused by the build-up of static electric charges
  • Engineered as an OEM replacement
  • Meets Type EC electro-chemical requirements as specified in SAE J1684
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Dayco – Straight Heater Hose; EPDM Rubber, 5/8 Inch Diameter (sold by foot) (Part No.80271)

Straight Heater Hose; EPDM Rubber, 5/8 Inch Diameter (sold by foot)

from

$1.99
Specifically designed to carry the heated coolant from the engine block to the heater core under the dashboard and return it to the engine, this Dayco Standard Heater Hose is constructed using all EPDM compounds and spiral reinforcement for high burst strength and excellent heat resistance. Made for general service on light trucks and passenger cars, this hose is similar to SAE 20R3, Class D-2 and has a temperature rating of -40 Degree F (-40 Degree C) to +257 Degree F (+125 Degree C). This Dayco Standard Heater Hose is compatible with all common coolant and coolant additives. Note: This hose is NOT suitable for fuel or oil transfer.

Product Features:
  • Specifically designed to be compatible with all common coolants and coolant additives
  • Constructed using all EPDM compounds and spiral reinforcements
  • Similar to SAE 20R3, Class D-2
  • Has a high burst strength and excellent heat resistance of -40 Degree F (-40 Degree C) to +257 Degree F (+125 Degree C)
  • PLEASE NOTE: Item is sold and priced by the foot. See store for details.
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Most Popular Heater Hose for 1974 Mazda RX-4s

Enhance your 1974 Mazda RX-4 with this popular Heater Hose we have in stock, for $1.99.

Dayco – Straight Heater Hose; EPDM Rubber, 5/8 Inch Diameter (sold by foot) (Part No.80271)

Straight Heater Hose; EPDM Rubber, 5/8 Inch Diameter (sold by foot)

from

$1.99
Specifically designed to carry the heated coolant from the engine block to the heater core under the dashboard and return it to the engine, this Dayco Standard Heater Hose is constructed using all EPDM compounds and spiral reinforcement for high burst strength and excellent heat resistance. Made for general service on light trucks and passenger cars, this hose is similar to SAE 20R3, Class D-2 and has a temperature rating of -40 Degree F (-40 Degree C) to +257 Degree F (+125 Degree C). This Dayco Standard Heater Hose is compatible with all common coolant and coolant additives. Note: This hose is NOT suitable for fuel or oil transfer.

Product Features:
  • Specifically designed to be compatible with all common coolants and coolant additives
  • Constructed using all EPDM compounds and spiral reinforcements
  • Similar to SAE 20R3, Class D-2
  • Has a high burst strength and excellent heat resistance of -40 Degree F (-40 Degree C) to +257 Degree F (+125 Degree C)
  • PLEASE NOTE: Item is sold and priced by the foot. See store for details.
See More

FAQs for 1974 Mazda RX-4 Heater Hoses

What’s the price range for 1974 Mazda RX-4 Heater Hoses?

We currently have just one Heater Hoses for the 1974 Mazda RX-4 in stock: Straight Heater Hose; EPDM Rubber, 5/8 Inch Diameter (sold by foot) and it costs $1.99.

Does Advance Auto Parts sell Heater Hoses for other Mazda RX-4 model years?

Yes, we carry Heater Hoses for 3 model years of Mazda RX-4s between 1975 and 1978. The following model years are the most popular for Heater Hose purchases: 1978, 1977, 1976, and 1975.

Does Advance Auto Parts sell Heater Hoses for any other 1974 Mazda models?

Yes. We stock Heater Hoses for 2 other popular 1974 Mazda models. Some of the most popular are 1974 RX-2 Heater Hoses, 1974 808 Heater Hoses, and 1974 RX-3 Heater Hoses.

What types of Heater Hoses do you sell for my 1974 Mazda RX-4?

We currently have just 1 Heater Hose in stock for a 1974 Mazda RX-4, and as of 11/2/25, it is a Heater Hose.

Can I get help with 1974 Mazda RX-4 Heater Hose orders?

Contact our customer support team by chat or phone, through the help desk page, where you can find instant answers about Mazda Heater Hoses and more.

What is your return policy for Mazda RX-4 Heater Hoses?

Advance Auto Parts keeps returns simple. For new Mazda RX-4 Heater Hoses and accessories, your online orders can be returned, in their original condition, within 45 days. For requirements, see the returns page.