Aisin WQT-800 Drive Motor Inverter Cooler Water Pump

Aisin WQT-800 Inverter Cooler Water Pump

The Aisin WQT-800 is a compact, lightweight OE-manufactured water pump for hybrid inverter cooling. It is built for 2004-2009 Toyota Prius applications and supports stable coolant circulation in the inverter cooling system.

Key Features

• OE-manufactured inverter cooler water pump
• Compact, lightweight design for hybrid cooling service
• Direct application for 2004-2009 Toyota Prius
• Cross-references Airtex AW6666 and Beck/Arnley 131-2533
• Part number WQT-800 for easy identification

Detailed Description

This Aisin inverter cooler water pump is a direct-fit cooling component for the Toyota Prius hybrid system. It circulates coolant through the drive motor inverter circuit to help maintain proper operating temperatures in the inverter assembly. If you are searching for a Toyota Prius inverter water pump, hybrid coolant pump, or Aisin WQT-800 replacement, this part matches the listed 2004-2009 Prius fitment.

Fits 2004-2009 Toyota Prius, N/A.

Common Issues It Can Address

• Inverter cooling pump failure
• Reduced coolant circulation in the hybrid cooling circuit
• Overheating warnings related to inverter temperature
• Noise or inconsistent operation from the electric coolant pump
• Need for an OE-style replacement on a Toyota Prius hybrid

Installation Notes and Tips

Verify the part number WQT-800 against the original pump before installation. Confirm coolant condition, inspect hoses and electrical connectors, and bleed the cooling system after service to remove trapped air. Use the vehicle’s service information for the correct Prius hybrid cooling procedure.

Quality Assurance

Aisin is known for OE manufacturing standards, and this pump is produced as an OE-style replacement for hybrid inverter cooling service. It is listed for 2004-2009 Toyota Prius applications.