Chikia Fuel Pump Replacement Assembly for Hisun 400-750 (Pre-2021) — OEM-fit, High-Flow

High-flow OEM replacement fuel pump assembly compatible with select Hisun, Axis, MSU and other pre-2021 EFI UTV models.

This Chikia-branded replacement fuel pump is built to drop into many EFI UTVs made before 2021, restoring reliable fuel delivery for engines in the 400–750 class. It’s offered as a single assembly and lists several manufacturer part numbers so you can match it to your machine. The unit is intended for use as an OEM-style substitute where the original pump has worn out, failed, or needs servicing during routine maintenance.

Which vehicles will this fuel pump fit?

The pump is compatible with a range of pre-2021 EFI models across multiple brands. It fits Hisun UTVs in the 400, 450, 500, 550, 700 and 750 lines as well as Axis and MSU 500/700 variants. It also lists compatibility with earlier Coleman, Bennche Bighorn and Cub Cadet Challenger models that use the same EFI pump design.

• Hisun EFI models: 400, 450, 500, 550, 700, 750 (pre-2021)
• Axis and MSU: 500 and 700 models
• Coleman UT500, UT700 and Bennche Bighorn 500/700
• Cub Cadet Challenger series: 500, 550, 700, 750

How do I confirm this is the correct part for my machine?

Match the pump’s listed part numbers and the vehicle model year to your original equipment. The listing includes several manufacturer numbers that help verify compatibility; if your current pump matches any of them, this assembly should fit as a direct replacement. Also check your machine’s service manual or consult a technician before purchasing.

• Cross-reference part numbers: 39500-115H-0000, 358700002, 16521-055-0000
• Confirm your UTV is a pre-2021 EFI model
• Compare electrical connector and mounting style with the original unit

What’s included and what should I expect during installation?

The package contains one complete fuel pump assembly ready for installation. Expect a like-for-like replacement process: remove the fuel tank access panel, disconnect lines and electrical connectors, swap the old pump for the new assembly, then reassemble. Basic hand tools and attention to fuel-safety procedures are required.

• Package contents: 1 x fuel pump assembly
• Installation: swap with existing pump, reconnect fuel and electrical fittings
• Tools: basic hand tools; follow fuel-handling safety and vehicle manual

Are there any models that this pump does NOT fit?

Yes — this assembly is not suited for certain Massimo and Bennche series that use different EFI pump designs. Specifically, it will not fit Massimo T-Boss or Buck series machines, nor Bennche T-Boss series vehicles. Verify excluded models before ordering to avoid returns.

• Not compatible with Massimo T-Boss series
• Not compatible with Massimo Buck series
• Not compatible with Bennche T-Boss series

Who this is for: Owners, mechanics, and fleet operators who need a reliable OEM-style replacement fuel pump for pre-2021 EFI UTVs will appreciate this Chikia assembly. It’s aimed at users who prefer a direct-fit, part-number-matched solution for routine repair or restoration projects on Hisun, Axis, MSU, Coleman, Bennche Bighorn and Cub Cadet Challenger machines. If you’re unsure about fitment, check your vehicle’s part number or consult a qualified service technician before purchase.