zozoye Radiator Overflow Tank for Polaris Sportsman Ranger RZR ACE – Direct-Replace Surge Reservoir, OEM Fit

Replacement radiator overflow surge tank engineered to fit multiple Polaris ATV and UTV models, restoring proper coolant expansion control and preventing loss of fluid during heavy use.

This zozoye radiator overflow tank is a direct-replacement surge reservoir designed to match the mounting points and hose connections on a wide range of Polaris models. Manufactured to the OEM part numbers 5436936 and 5431673, the tank arrives as a single unit ready to install. It’s intended for owners who need a reliable, vehicle-specific coolant overflow container after damage, cracking, or when upgrading worn components.

Which Polaris machines will this overflow tank fit?

The tank fits dozens of model years across Polaris Sportsman, Ranger, RZR, ACE and several specialty lines. Refer to your vehicle’s year and edition to confirm compatibility; common matches include Sportsman 400–1000 variants, Ranger 400–900 families, RZR 570/800 series and ACE 325/500/570 models.

• Compatible with OEM part numbers 5436936 and 5431673
• Covers Sportsman, Ranger, RZR, ACE, Magnum and other Polaris lines listed in the fitment
• Includes models from mid-1990s through recent years where specified
• Check exclusions such as certain full-size or EPS editions before purchase

How simple is installation and what comes in the package?

Installation is straightforward for anyone comfortable with basic ATV/UTV maintenance: remove the old tank, disconnect hoses, and bolt the new surge tank into place. The product ships as one complete radiator overflow surge tank and is intended to be a like-for-like swap with factory mounting points.

• Package contains: Radiator Overflow Surge Tank x1
• Pre-drilled mounting holes match factory locations for direct fit
• No additional hardware included—reuse existing clamps and hoses when applicable
• Recommended: inspect hoses and clamps; replace if brittle or corroded

What materials and durability can I expect?

The replacement reservoir is molded from heat-tolerant plastic formulated for engine-bay use, resisting coolant and temperature cycling. While not a lifetime guarantee, the design aims to perform similarly to OEM tanks when properly installed and maintained.

• Heat-resistant plastic construction suitable for engine compartment conditions
• Engineered to withstand normal coolant expansion and contraction
• Resists typical coolant types used in Polaris vehicles
• Inspect periodically for cracks or stress at hose connections

What support and warranty are available if something goes wrong?

zozoye offers customer support and a limited service period to help resolve fitment and quality questions. If you encounter problems with the tank, contact the seller promptly to access troubleshooting help or warranty service.

• Customer service available 24 hours via the seller’s support channels
• 1-year product service coverage for defects or fitment issues
• Keep order and vehicle information handy when contacting support
• Return policies and timelines vary by retailer—check at purchase

Who is this for: This radiator overflow surge tank is aimed at Polaris owners and mechanics who need an OEM-style coolant reservoir replacement for Sportsman, Ranger, RZR, ACE, Magnum and related models. If your vehicle shows coolant loss, a cracked or warped tank, or you are restoring older machines to working condition, this zozoye part provides a direct-fit option without the need for custom modifications. Ensure the year and edition of your Polaris model match the fitment list before ordering.