Gates 44050 Engine Water Pump - Main

Gates Water Pump for Lexus Applications

The Gates 44050 engine water pump is a standard replacement for select Lexus models that use an accessory-belt drive. Built with a cast aluminum housing and stamped steel impeller, it is engineered for dependable coolant circulation and OE-style fitment on applications such as Lexus GS350, IS350, IS250, and GS450h.

Gates Water Pump (Standard) components are built for consistent operation and are tested for seal and bearing function as well as leakage before release. The 44050 is a practical choice for drivers replacing a worn water pump on Lexus GS300, GS350, IS250, IS350, RC350, RC300, and GS450h applications.

Key Features

• Cast aluminum housing for durable cooling-system service
• Stamped steel impeller with standard rotation
• Accessory belt drive style; not timing-belt driven
• Includes water pump, 2 gaskets, and shroud/back plate
• 1 outlet configuration
• No back housing, thermostat housing, fan clutch, or pulley included
• 100% functional testing of seals and bearings
• 100% leakage testing of the casting and assembled pump

Detailed Description

This Gates 44050 water pump is part of the Gates Water Pump (Standard) line, a product line focused on direct-fit cooling-system replacement parts for everyday repair work. It uses premium alloy materials and is manufactured to support reliable coolant flow in accessory-belt-driven Lexus engines. This part cross-references Airtex AW6143 and Beck/Arnley 131-2306 for the same application.

Compatible With 2006-2018 Lexus IS350, 2006-2015 Lexus IS250, 2007-2011 Lexus GS350, 2013-2015 Lexus GS350, 2007-2011 Lexus GS450h, 2013-2014 Lexus GS450h, 2015-2018 Lexus GS450h, 2006 Lexus GS300, 2015-2018 Lexus RC350, 2016-2018 Lexus RC300, and 2016-2018 Lexus IS300.

What It Helps Address

• Coolant circulation problems caused by a worn pump
• Leakage at the pump casting or seal area
• Bearing noise or rough pump operation
• Overheating concerns tied to reduced coolant flow
• Service replacement on Lexus GS350, IS350, and GS450h cooling systems

Installation Notes and Tips

Verify accessory-belt drive configuration before installation. Replace the included gaskets during service and inspect the mating surfaces, belt condition, and surrounding cooling-system components. Confirm the pump rotation, outlet layout, and application match the vehicle before assembly. Fits 2006-2018 Lexus IS350, 2006-2015 Lexus IS250, 2007-2011 Lexus GS350, 2013-2015 Lexus GS350, 2007-2011 Lexus GS450h, 2013-2014 Lexus GS450h, 2015-2018 Lexus GS450h, 2006 Lexus GS300, 2015-2018 Lexus RC350, 2016-2018 Lexus RC300, and 2016-2018 Lexus IS300.

Quality Assurance

Gates tests each new water pump for seal and bearing function and performs leakage checks on both the casting and the assembled unit. The result is an OE-quality fitment approach for Lexus cooling-system repair, backed by Gates manufacturing standards.