Gates 21506 Radiator Coolant Hose - Lower or Upper
OE Quality 60-Day Returns
Gates
 Molded Coolant Hose

Gates 21506 Radiator Coolant Hose - Lower or Upper

Brand Gates 21506
Position Upper
0
Yes
Branch Quantity 0
Centerline Length 25
Centerline Length 635
Contains Spring No
End 1 Inside Diameter 1.37
End 1 Inside Diameter 35
End 2 Inside Diameter 1.37
End 2 Inside Diameter 35
Material EPDM
Modular Hose No
Molded Yes
Number of Quick Connect Fittings 0
Product line Molded Coolant Hose
Fits Saab and Nissan · 14 vehicles

OEM-quality specifications. Built for coolant hose replacement with a molded design.

EPDM construction. Resists heat and coolant exposure for dependable service.

Molded hose line. Covers a wide range of coolant applications.

Cross-references Continental 61293, Dayco 71671 and Eastern Catalytic 41293 for the same application. See all 21.

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Gates 21506 Molded Coolant Hose

The Gates 21506 molded coolant hose is an OE-style radiator coolant hose built for specific upper and lower cooling-system applications. Made from EPDM and formed to a molded shape, it supports direct replacement on select Saab 9000 and Nissan 200SX applications where the original hose routing and dimensions matter.

Key Features

  • EPDM construction for coolant-system service
  • Molded design for accurate hose routing
  • 1.37 in. (35 mm) inside diameter at both ends
  • 25 in. (635 mm) centerline length
  • No spring, no modular sections, and no quick-connect fittings
  • Fits upper and lower radiator and HVAC-compatible coolant/heater hose applications listed below

Product Details

Gates Molded Coolant Hose line is built around OEM-quality specifications for radiator hose replacement. The 21506 is shaped for the correct bend profile and dimensions, helping maintain proper coolant flow and fitment in vehicles that require a molded hose rather than a universal straight hose. This part cross-references Dayco 71671 for the same application.

Compatible With select 1984-1990 Nissan 200SX lower hose applications and 1986-1990 Saab 9000 upper hose applications, this Gates 21506 hose is a direct-fit replacement for vehicles that need the original molded routing. It is also referenced in interchange listings under Gates 21506 for catalog matching and service lookup.

What It Helps Solve

  • Cracked or aged radiator coolant hose material
  • Coolant leaks at a molded hose section
  • Poor hose routing caused by an incorrect straight hose replacement
  • Fitment issues on upper or lower cooling-system hose locations
  • Service delays when replacing a worn radiator or heater hose

Installation Notes

Verify end diameters, centerline length, and hose routing against the removed part before installation. Confirm whether the vehicle uses the upper or lower position listed in the fitment data, and inspect clamps, necks, and adjoining coolant components for wear before reassembly. For best results, install on a fully cooled engine and refill the cooling system according to the vehicle service procedure.

Quality Assurance

Gates manufactures this molded coolant hose to OEM-quality specifications for replacement use in cooling-system service. The molded construction and EPDM material support consistent fit and dependable hose routing in the listed applications.

Fitment

  • Fits 1986-1990 Saab 9000, upper. Radiator and HVAC compatible coolant and heater hose; Molded Coolant Hose.
  • Fits 1987-1988 Nissan 200SX, lower. Radiator and HVAC compatible coolant and heater hose; Molded Coolant Hose.
  • Fits 1984 Nissan 200SX, lower. Radiator and HVAC compatible coolant and heater hose; Molded Coolant Hose.
  • Fits 1984-1987 Nissan 200SX, lower. Molded Coolant Hose.

Related reading

This part fits 14 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelLitersCylindersFuel TypePositionNotes
1990Saab90002.0LL4GASUpperRadiator and HVAC compatible coolant and heater hose.; Molded Coolant Hose
1989Saab90002.0LL4GASUpperRadiator and HVAC compatible coolant and heater hose.; Molded Coolant Hose
1988Nissan200SX2.0LL4GASLowerRadiator and HVAC compatible coolant and heater hose.; Molded Coolant Hose
1988Saab90002.0LL4GASUpperRadiator and HVAC compatible coolant and heater hose.; Molded Coolant Hose
1987Nissan200SX1.8LL4GASLowerMolded Coolant Hose
1987Nissan200SX2.0LL4GASLowerRadiator and HVAC compatible coolant and heater hose.; Molded Coolant Hose
1987Saab90002.0LL4GASUpperRadiator and HVAC compatible coolant and heater hose.; Molded Coolant Hose
1986Nissan200SX1.8LL4GASLowerMolded Coolant Hose
1986Nissan200SX2.0LL4GASLowerMolded Coolant Hose
1986Saab90002.0LL4GASUpperRadiator and HVAC compatible coolant and heater hose.; Molded Coolant Hose
1985Nissan200SX1.8LL4GASLowerMolded Coolant Hose
1985Nissan200SX2.0LL4GASLowerMolded Coolant Hose
1984Nissan200SX1.8LL4GASLowerMolded Coolant Hose
1984Nissan200SX2.0LL4GASLowerRadiator and HVAC compatible coolant and heater hose.; Molded Coolant Hose
Directly replaces or cross-references 21 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
Continental — 61293Dayco — 71671Eastern Catalytic — 41293EXEDY OEM — MC211Gates — 21506NGK — 812977-8858-1286822126124X2150302F002150302S002150305F0075511857551187C1506E71671KM-2191L34-5806L34-5822MH-4506