HomeBelts and Cooling > Hoses and PipesGates 51645 Radiator Coolant Hose - Upper
Part #: 51645

Gates 51645 Radiator Coolant Hose - Upper

Molded Coolant Hose, Upper
⚙️ 23 vehicles fit this part
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OE Direct Replacement — Bolt-on fit, no modifications needed
📦Molded Coolant Hose, Upper
🚗Fitment: Volkswagen, Beetle, Jetta, and Passat
🔄Easy Returns — Return within 60 days for a full refund
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Reliable Radiator Coolant Hose for Volkswagen Vehicles

The Gates Molded Coolant Hose 51645 is engineered to provide dependable cooling system performance for Volkswagen Beetle, Jetta, and Passat models. Designed with durable materials and precise dimensions, this radiator coolant hose ensures proper fit and function in your vehicle's cooling system.

  • Constructed from EPDM, plastic, and steel for durability and heat resistance
  • Molded design with modular components including a branch and two female quick connectors
  • Centerline length of 25.5 inches (648 mm) for accurate fitment
  • End 1 inside diameter: 1.3 inches (33 mm); End 2 inside diameter: 1.38 inches (35 mm)
  • Includes two quick connect fittings for secure attachment
  • Compatible with Volkswagen Beetle, Jetta, and Passat models

About the Gates Molded Coolant Hose Product Line

The Molded Coolant Hose line by Gates focuses on precision-engineered hoses designed to meet specific vehicle cooling system requirements. This product line features molded hoses with integrated quick connectors and modular components, providing a reliable and efficient solution for coolant transfer. The 51645 part exemplifies this approach with its molded construction and built-in fittings, ensuring a secure and leak-resistant connection.

Product Details and Specifications

The Gates 51645 radiator coolant hose is made from a combination of EPDM rubber, plastic, and steel, materials chosen for their resistance to heat, pressure, and coolant chemicals. The hose features a molded design with a single branch and two female quick connectors, facilitating straightforward installation and maintenance. With a centerline length of 25.5 inches (648 mm), it fits precisely within the cooling system layout of compatible Volkswagen models. The hose ends have inside diameters of 1.3 inches (33 mm) and 1.38 inches (35 mm), ensuring proper connection to radiator and engine fittings.

Common Applications and Problem Solving

  • Replacement of worn or cracked radiator coolant hoses in Volkswagen Beetle, Jetta, and Passat
  • Resolving coolant leaks caused by deteriorated or damaged hoses
  • Maintaining optimal engine temperature by ensuring proper coolant flow
  • Preventing overheating issues related to faulty coolant hose connections
  • Upgrading to a molded hose with quick connectors for easier serviceability

Installation Notes and Tips

When installing the Gates Molded Coolant Hose 51645, ensure the vehicle is cool and the cooling system is depressurized. Verify the hose orientation and confirm the quick connectors engage securely with mating components. Inspect all connections for leaks after installation and refill the cooling system with the appropriate coolant mixture. Proper installation will help maintain system integrity and prevent premature hose failure.

Quality Assurance and Warranty

Gates manufactures the Molded Coolant Hose 51645 to meet stringent quality standards, using materials that withstand automotive cooling system demands. While specific warranty details are not provided, Gates products typically adhere to industry standards for durability and performance, offering reliable service life when installed and maintained correctly.

BrandGates
Part Number51645
PositionMolded Coolant Hose, Upper
MaterialEpdm, plastic, steel
End 1 Inside Diameter1.3
End 1 Inside Diameter33
End 2 Inside Diameter1.38
End 2 Inside Diameter35
Contains SpringNo
Centerline Length25.5
Centerline Length648
Centerline Length8
End 3 Inside Diameter.3
Branch Quantity1
9839Yes
98452
Modular ComponentsBranch, 2 female quick connectors
Modular HoseYes
MoldedYes
Number of Quick Connect Fittings2

This part fits 23 vehicles. Search below:

YearMakeModelLitersCylindersFuel TypePositionNotes
2018VolkswagenJetta1.8LL4GASUpperMolded Coolant Hose
2018VolkswagenJetta2.0LL4GASUpperMolded Coolant Hose
2017VolkswagenBeetle1.8LL4GASUpperMolded Coolant Hose
2017VolkswagenJetta1.8LL4GASUpperMolded Coolant Hose
2017VolkswagenJetta2.0LL4GASUpperMolded Coolant Hose
2017VolkswagenJetta2.5LL5GASUpperMolded Coolant Hose
2017VolkswagenPassat1.8LL4GASUpperMolded Coolant Hose
2016VolkswagenBeetle1.8LL4GASUpperMolded Coolant Hose
2016VolkswagenBeetle2.0LL4GASUpperMolded Coolant Hose
2016VolkswagenJetta1.8LL4GASUpperMolded Coolant Hose
2016VolkswagenJetta2.0LL4GASUpperMolded Coolant Hose
2016VolkswagenPassat1.8LL4GASUpperMolded Coolant Hose
2015VolkswagenBeetle1.8LL4GASUpperMolded Coolant Hose
2015VolkswagenBeetle2.0LL4GASUpperW/O Aux. Rad.; Molded Coolant Hose
2015VolkswagenJetta1.8LL4GASUpperMolded Coolant Hose
2015VolkswagenJetta2.0LL4GASUpperMolded Coolant Hose
2015VolkswagenPassat1.8LL4GASUpperMolded Coolant Hose
2014VolkswagenBeetle1.8LL4GASUpperMolded Coolant Hose
2014VolkswagenBeetle2.0LL4GASUpperW/O Aux. Rad.; Molded Coolant Hose
2014VolkswagenJetta1.8LL4GASUpperMolded Coolant Hose
2014VolkswagenJetta2.0LL4GASUpperMolded Coolant Hose
2014VolkswagenPassat1.8LL4GASUpperMolded Coolant Hose
2013VolkswagenBeetle2.0LL4GASUpperW/O Aux. Rad.; Molded 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:

27444X516455C0122101AAR25735

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