HomeBelts and Cooling > Hoses and PipesGates 51874 Radiator Coolant Hose - Lower
Part #: 51874

Gates 51874 Radiator Coolant Hose - Lower

Molded Coolant Hose, Lower
⚙️ 12 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
📦Molded Coolant Hose, Lower
🚗Fitment: Mazda, 6 and CX-5
🔄Easy Returns — Return within 60 days for a full refund
🚚Fast Shipping — Most orders ship same business day before 1pm CST

Overview of Gates Molded Coolant Hose 51874

The Gates Molded Coolant Hose 51874 is designed for reliable cooling system performance in select Mazda vehicles. Engineered with durable EPDM material, this radiator coolant hose ensures consistent fluid flow and heat resistance for your Mazda 6 and CX-5 models.

  • Constructed from high-quality EPDM material for heat and chemical resistance
  • Centerline length of 31.97 inches (812 mm) for precise fitment
  • Uniform inside diameter of 1.25 inches (32 mm) on both ends
  • Does not contain a spring, providing a molded, flexible design
  • Compatible with Mazda 6 and Mazda CX-5 cooling systems

About the Molded Coolant Hose Product Line

The Molded Coolant Hose line by Gates offers pre-formed hoses designed to match the exact contours and specifications of vehicle cooling systems. This eliminates the need for bending or shaping during installation, reducing the risk of kinks or leaks. The 51874 part benefits from this precise molding, ensuring a secure and reliable connection within the Mazda cooling circuit.

Detailed Product Description

This radiator coolant hose features EPDM construction, a synthetic rubber known for its excellent resistance to heat, ozone, and coolant chemicals. Both ends of the hose have an inside diameter of 1.25 inches (32 mm), providing consistent flow and compatibility with factory fittings. The centerline length of approximately 31.97 inches (812 mm) matches OEM specifications for a proper fit without modification. The absence of an internal spring allows for a smooth coolant path and flexibility while maintaining structural integrity.

Common Applications and Problem Solving

  • Replacement of worn or cracked radiator coolant hoses in Mazda 6 and CX-5 models
  • Resolving coolant leaks caused by hose degradation or swelling
  • Addressing overheating issues related to compromised coolant flow
  • Preventing coolant contamination from hose material breakdown
  • Maintaining proper coolant system pressure and circulation

Installation Notes and Tips

Ensure the engine is cool before removing the old hose to avoid burns. Verify that the hose diameter and length match the original part to maintain system integrity. Use appropriate clamps to secure the hose ends without over-tightening, which can damage the hose. Inspect surrounding components for wear or damage during installation to prevent future leaks.

Quality Assurance and Warranty

Gates Molded Coolant Hose 51874 is manufactured to meet or exceed OEM standards for durability and performance. The EPDM material provides long-lasting resistance to heat and coolant chemicals. While specific warranty details are not provided here, Gates products typically come with manufacturer-backed quality assurance to support reliable operation in Mazda 6 and CX-5 vehicles.

BrandGates
Part Number51874
PositionMolded Coolant Hose, Lower
MaterialEpdm
End 1 Inside Diameter1.25
End 1 Inside Diameter32
End 2 Inside Diameter1.25
End 2 Inside Diameter32
Contains SpringNo
Centerline Length31.97
Centerline Length812
Branch Quantity0
9839Yes
98450
9940No

This part fits 12 vehicles. Search below:

YearMakeModelLitersCylindersFuel TypePositionNotes
2025MazdaCX-52.5LL4GASLowerMolded Coolant Hose
2024MazdaCX-52.5LL4GASLowerMolded Coolant Hose
2023MazdaCX-52.5LL4GASLowerMolded Coolant Hose
2022MazdaCX-52.5LL4GASLowerMolded Coolant Hose
2021Mazda62.5LL4GASLowerMolded Coolant Hose
2021MazdaCX-52.5LL4GASLowerMolded Coolant Hose
2020Mazda62.5LL4GASLowerMolded Coolant Hose
2020MazdaCX-52.5LL4GASLowerMolded Coolant Hose
2019Mazda62.5LL4GASLowerMolded Coolant Hose
2019MazdaCX-52.5LL4GASLowerMolded Coolant Hose
2018Mazda62.5LL4GASLowerMolded Coolant Hose
2018MazdaCX-52.5LL4GASLowerMolded Coolant 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:

51874F11574PYFB1518Y

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