Aluminum Radiator For Honda TRX 420 500 520 ATV 2014 To 2024 Aftermarket Replacement 19010 HR3 A21

Upgrade your TRX 420/500/520 ATV with a purpose-built aftermarket replacement radiator designed to drop straight in where the OEM part sits, replacing 19010-HR3-A21. This aluminum radiator supports models built from 2014 through 2024 and is engineered to improve cooling efficiency, increase coolant capacity, and resist the punishment of trail and farm use without requiring fabrication. The core is brazed aluminum with polished end tanks, delivering robust durability and efficient heat transfer under load.

Common wear from rugged terrain—damaged fins, cracked end tanks, and internal leaks—can throttle cooling performance and leave you stranded on the trail. This replacement uses a 26 mm core thickness and precise TIG-welded construction to withstand hits and vibrations, maintain steady coolant flow, and keep engine temperatures in check during long, demanding sessions on the trail or the work site.

Comprehensive Vehicle Fitment

Product Specifications

OEM & Aftermarket Cross-Reference Information

What's Included

Each box contains the essential components listed below.

• Radiator
• Cap

Related hoses, clamps, and mounting hardware are not included unless specified.

Why Choose This Aftermarket Replacement?

• Direct-Fit Compatibility: Exact mounting points and hose connections mirror the original, making installation straightforward.
• OEM Cross-Reference: Aligns with 19010-HR3-A21 and 19010-HR3-J21, ensuring easy sourcing from dealers.
• Premium Materials: Fully aluminum core with TIG-welded end tanks and epoxy-free brazed construction for longevity and reliable heat transfer.
• Improved Cooling Performance: 26 mm core and enhanced flow deliver cooler engine temps under heavy use and extended runs.
• Increased Durability: Solid welds and robust aluminum construction resist impact damage common on trails and farms.
• Value-Driven Reliability: A purpose-built upgrade designed to restore cooling performance without OEM price tags.

Installation Notes:

• Safety first: Ensure the engine is completely cool before starting work; relieve cooling system pressure before removing the radiator cap.
• Drain and prepare: Drain coolant into a proper container and have fresh coolant ready for refill and bleeding.
• Disconnect carefully: Label and disconnect any fan wiring or sensors, then detach hoses with care to avoid damaging fittings.
• Check mounting points: Inspect brackets and mounting studs for damage; replace bent hardware to avoid misalignment.
• Fit and seal: Position the radiator with the core aligned to mounting ears; snug mounting bolts evenly to avoid stressing end tanks.
• Bleed and test: Refill coolant, bleed air from the system, start the engine, and watch for leaks while warming up to operating temperature.

Why Upgrade?

Running a worn or underperforming radiator risks overheating, reduced engine efficiency, and potential head gasket damage, especially during heavy-use tasks or long trail runs. This aftermarket replacement restores reliable cooling performance, helping maintain stable temperatures and protecting engine longevity when you’re chasing work and miles off-road.