AISIN Inverter Cooler Water Pump WQT-800 for Toyota Prius (2004–2009) — OEM all-new, corrosion-resistant

AISIN's WQT-800 is a brand-new OEM inverter cooler water pump kit engineered to maintain inverter temperature control on select Toyota Prius models. AISIN built this inverter cooler water pump kit to the same exacting standards used for factory parts. The assembly uses new components — not remanufactured pieces — and features optimized flow pathways, precision rotors, and durable bearings to move coolant through the inverter cooler efficiently and resist rust, corrosion, and scale. Proper inverter cooling reduces thermal stress on hybrid power electronics, helping avoid premature failures and expensive repairs.

How does the pump improve inverter cooling in a Prius?

The WQT-800 circulates coolant through the inverter cooler to transfer heat away from hybrid power electronics. Its refined rotor design and smooth flow channels reduce turbulence and help maintain steady coolant circulation under varied driving conditions.

• Engineered rotors for consistent flow and reduced cavitation
• Smooth coolant channels for efficient heat transfer
• Ball bearings designed for long service life and quiet operation

What makes this AISIN kit different from aftermarket or remanufactured pumps?

This kit is produced using all-new components and materials selected specifically to resist the common causes of pump failure such as scaling, corrosion, and rust. AISIN’s manufacturing tolerances and material upgrades align with original equipment performance and longevity expectations.

• All-new internals — no remanufactured parts included
• Materials chosen to withstand coolant chemistry and contaminants
• Manufactured to AISIN’s OE-level quality controls

Will this pump fit my Toyota Prius and how do I confirm compatibility?

The WQT-800 is intended for specific Toyota Prius model years; fitment can depend on engine and vehicle sub-variants. Use the vehicle fitment checker provided by the seller or cross-reference AISIN part numbers with your VIN to confirm exact compatibility before purchase.

• Compatible: Toyota Prius (model years 2004–2009) — verify engine details
• Check VIN or OEM part reference to avoid installation issues
• Consult installation guide or technician for model-specific steps

How long can I expect the inverter cooler water pump to last and what maintenance helps it endure?

Service life varies by driving conditions and coolant maintenance, but AISIN’s design improvements are intended to extend operational longevity versus degraded components. Maintaining the recommended coolant type and change intervals, and avoiding contaminants, will help the pump last longer.

• Regular coolant flushing and use of manufacturer-recommended coolant
• Inspect hoses and connections for leaks or contamination
• Replace the pump promptly if overheating or unusual noise occurs

Who is this for This AISIN WQT-800 inverter cooler water pump kit is aimed at Prius owners, hybrid repair shops, and technicians seeking a factory-grade replacement for inverter cooling components. If you prioritize OEM fit, new-component reliability, and materials engineered to resist corrosion and scaling, this kit offers a direct-fit solution designed to protect hybrid inverter components and reduce the risk of overheating-related failures. Always confirm vehicle fitment before ordering and follow professional installation practices when replacing inverter cooling components.

FAQ

Q: Is the AISIN WQT-800 a new or remanufactured part?

A: The WQT-800 kit is made from all-new components, not remanufactured parts.

Q: Which Prius years is this pump compatible with?

A: This pump fits select Toyota Prius models from 2004 to 2009; verify fitment with your VIN.