AISIN Engine Water Pump WPT-111 with Gasket – OEM-quality fit for Scion xA/xB & Toyota Echo, Prius, Yaris

AISIN WPT-111 is a new, OEM-quality engine water pump with gasket engineered to restore reliable coolant circulation for compatible Scion and Toyota models.

This water pump is built from all-new components using AISIN’s long-established engineering to deliver consistent coolant flow, durable bearings, and carbon-ceramic mechanical sealing. It replaces worn or failing pumps in select Scion xA/xB and Toyota Echo, Prius, and Yaris vehicles, and comes with a matching gasket for straightforward installation. The unit’s materials resist rust, corrosion, and common scaling to extend service life compared with many aftermarket alternatives.

How will this pump affect engine cooling performance?

The WPT-111 restores designed coolant circulation so the thermostat and radiator can regulate engine temperature effectively. Its smooth flow channels and efficient rotor design reduce turbulence and help maintain consistent coolant pressure under typical driving conditions.

• Carbon-ceramic mechanical seal minimizes leaks and wear
• Precision rotor and flow channel shapes for steady coolant movement
• Ball bearings provide smoother rotation and longer life

What vehicles does this part fit and how should I confirm compatibility?

This water pump is compatible with specific model years of Scion and Toyota vehicles, but engine variations can affect fit. Use your vehicle’s year, model, and engine code in the fitment checker or cross-reference OEM part numbers before ordering to ensure correct match.

• Scion: 2004–2006 xA, 2004–2006 xB
• Toyota: 2000–2005 Echo, 2001–2009 Prius, 2006–2018 Yaris
• Always verify engine application and part number for exact fit

What are the build features and durability advantages of this AISIN pump?

AISIN focuses on materials and design choices that resist common failure modes such as rust, corrosion, and coolant scaling. The WPT-111 uses upgraded materials and an OEM-level manufacturing process, so the pump performs like the original equipment it replaces.

• All-new components — no remanufactured parts
• Materials selected to resist rust and scaling
• Factory-quality machining and assembly for consistent tolerances

What comes in the box and what should I expect during installation?

The pump ships with the required gasket to simplify the replacement process and reduce the need to source extra parts. Installation follows standard cooling-system procedures: drain coolant, remove accessory components as needed, replace the pump and gasket, and refill with the correct coolant type and volume.

• Included: AISIN WPT-111 water pump and matching gasket
• Installation: drain coolant, swap pump, reinstall, refill and bleed system
• Recommended: inspect belts, hoses, and thermostat during service

Who is this for? Mechanics, DIY enthusiasts, and fleet managers who need an OEM-standard replacement water pump for select Scion and Toyota models will find the AISIN WPT-111 suitable. It’s intended for owners wanting a like-for-like, new-component replacement that emphasizes material quality and reliable coolant flow rather than a budget remanufactured option. Confirm vehicle fitment before purchase and follow standard cooling-system service practices during installation.