Gates 21870 Radiator Coolant Hose - Upper

Brand	Gates 21870
Position	Upper
	0
	Yes
Branch Quantity	0
Centerline Length	28.6
Centerline Length	726
Contains Spring	No
End 1 Inside Diameter	1.34
End 1 Inside Diameter	34
End 2 Inside Diameter	1.34
End 2 Inside Diameter	34
Material	EPDM
Modular Hose	No
Molded	Yes
Number of Quick Connect Fittings	0
Product line	Molded Coolant Hose
Fits	Nissan

OEM-quality specifications. Molded coolant hose built to match replacement needs with confidence.

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

Molded design. Fits coolant applications with a formed shape for easier installation.

Cross-references AP Exhaust 8560, Dayco 71488 and Dayco 71612 for the same application. See all 12.

$33.76Free shipping

In stock · usually ships same day before 1pm CST

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Not what you need? See all Radiator Coolant Hose options

Gates 21870 Molded Radiator Coolant Hose

Gates 21870 is a molded radiator coolant hose built to OEM-quality specifications for upper, lower, bypass, heater, and other coolant routing applications. Made from EPDM, it is shaped for a precise coolant path and dependable fit in service replacements for vehicles such as Honda Civic and similar applications where molded hose geometry matters.

Key Features

EPDM construction for coolant-system durability
Molded hose design for a formed, OE-style routing profile
34 mm inside diameter at both ends
726 mm centerline length for the specified application
No spring and no quick-connect fittings
Direct replacement part number 21870 for radiator coolant hose service

Product Details

Part number 21870 is part of Gates’ Molded Coolant Hose line, a range focused on replacement hoses for upper radiator hose, lower radiator hose, bypass hose, heater hose, and related cooling-system connections. The molded construction helps match the original hose shape, which is important when replacing a formed hose on a Honda Civic, Acura, or other vehicle using this style of coolant routing. Gates 21870 is specified with EPDM material, a 34 mm end inside diameter on both ends, and a 726 mm centerline length.

This part cross-references Dayco 71488 and 71612 for the same application.

What It Helps Fix

Coolant leaks from a cracked or aged radiator hose
Softening, swelling, or collapse in an original molded hose
Improper hose routing caused by a misshaped replacement
Overheating concerns linked to restricted coolant flow
Service delays when replacing a formed hose on Honda Civic or similar applications

Installation Notes

Verify hose routing, end diameters, and centerline length before installation. Inspect adjoining fittings, clamps, and coolant passages for wear or contamination, and replace damaged components as needed. Confirm the hose follows the original molded path without twist or tension, then refill and bleed the cooling system according to the vehicle service procedure.

Quality Assurance

Gates manufactures its Molded Coolant Hose line to OEM-quality specifications for radiator hose replacement service. Part number 21870 is built as a molded EPDM coolant hose for formed-fit cooling-system applications.

This part fits 0 vehicles

Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

Year	Make	Model	Position	Notes
No rows match your filter.

Directly replaces or cross-references 12 part numbers

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

AP Exhaust — 8560Dayco — 71488Dayco — 71612FEL-PRO — 61631Gates — 2187014-2625-021501G5E0026196X2150165E00C71612E71488KM-2346