Gates 41577E Engine Auxiliary Water Pump

Gates 41577E Electric Water Pump Overview

The Gates 41577E is an OE Performance electric engine auxiliary water pump built for reliable cooling and heating system operation. It uses premium materials and an electric drive design to support efficient thermal management in modern hybrid applications, including Lexus NX300h, GS450h, Toyota Mirai, and Toyota RAV4 models.

Gates Water Pump (Electric) products are part of a focused line for vehicles that rely on electrically driven coolant circulation. The 41577E is engineered to restore proper coolant flow in auxiliary inverter and hybrid drive systems while maintaining a precise OE-quality fit.

Key Features

• Electric engine auxiliary water pump for hybrid and inverter cooling systems
• OE Performance grade for factory-style fit and function
• Plastic housing and plastic impeller construction
• Standard impeller rotation
• Two outlet connections
• No pulley, no fan clutch, and no back housing included
• Application description: Auxiliary Inverter

Detailed Product Description

Built for vehicles that depend on electric coolant circulation, Gates part number 41577E helps maintain proper thermal control in the cooling and heating system. Its electric water pump drive type supports applications where mechanical belt-driven pumps are not used, making it a direct-fit solution for hybrid drive and inverter-related cooling needs. This part cross-references Monroe Shocks & Struts (e.g., 170-4020, 941577E) for the same application.

Compatible With 2014-2018 Lexus GS450h, 2015 and 2016-2021 Lexus NX300h, 2016-2018 Toyota Mirai, and 2016-2018 Toyota RAV4. The Gates 41577E is a practical replacement when the original electric auxiliary pump is no longer maintaining consistent coolant flow.

What This Water Pump Helps Address

• Loss of coolant circulation in an auxiliary inverter circuit
• Overheating concerns tied to electric pump wear or failure
• Reduced heater performance in hybrid cooling systems
• Temperature control issues in inverter-equipped vehicles
• Noise or inconsistent operation from a failing electric water pump

Installation Notes and Tips

Verify connector style, hose routing, and outlet configuration before installation. Because this is an electric auxiliary water pump, confirm the vehicle’s cooling system is properly bled after replacement and inspect related hoses, clamps, and coolant condition at the same time. Use the vehicle service information for the exact installation procedure on Lexus NX300h, Lexus GS450h, Toyota Mirai, and Toyota RAV4 hybrid-drive applications.

Quality Assurance

Gates manufactures this electric water pump with premium materials and OE Performance standards to support durable operation under demanding driving conditions. The 41577E is built to deliver OE-quality fit for the listed applications and restore proper cooling system performance.