Toyota Camry 18-24 / Electric Water Pump Replacement / 2.5L / P26CB Highlander Sienna Lexus A25A-FKS

PARTS USED: Aisin WPT-207 Water Pump: https://amzn.to/4n6yz6H Aisin THT-023 Thermostat: https://amzn.to/4tgbC2l O-Ring: You can find it on ROCKAUTO.com Here are some part numbers that will cross reference to 16325-25010 MAHLE / CLEVITE — K33776 ELRING — 917940 VICTOR REINZ — 711790100 @toyotausa @aisinaftermarket1133 @toyotacamryclubgeorgia1425 TOOLS USED FOR A25A-FKS Water Pump: Zero Offset METRIC Wrench Set: https://amzn.to/4n6EU2c Hose Clamp Long Reach Tool: https://amzn.to/4t7sWH3 Electrical Disconnect Pliers: https://amzn.to/4tP0tHa Wrench Extender (WP BOLTS): https://amzn.to/4tR3arI Vacuum Coolant Fill/Check Device: https://amzn.to/4w28XfD Kimo 3/8ths Electric Ratchet 20V: https://amzn.to/4d6dftF Milwaukee Deep Metric Sockets: https://amzn.to/4tbX4B6 ICON Drive Belt Tool: https://tinyurl.com/4bh7pn45 The failures of Aisin electric water pumps on Toyota’s 2.5L A25A-FKS engines are generally not due to a single defect, but rather a combination of design sensitivity, early production inconsistencies, and the inherent complexity of the modern cooling system. At the core of the issue is the pump’s sealing system—specifically the O-ring and housing interface—which can be sensitive to slight variations in compression during manufacturing. When this seal is even marginally compromised, coolant can slowly leak past it and migrate into the electric motor or connector, leading to corrosion, electrical faults, and eventual pump failure. This problem was more pronounced in early production units, particularly around the 2020 model year, where defects often appeared at relatively low mileage and were linked more to manufacturing variability than wear. Once coolant intrusion occurs, the electronically controlled, variable-speed pump becomes especially vulnerable, as even minor contamination can trigger diagnostic trouble codes, reduced performance, or complete shutdown. Compounding the issue is the high duty cycle and thermal stress of these pumps, which operate continuously under varying speeds, along with the broader cooling system design that includes multiple loops and components, increasing pressure fluctuations and stress on seals. Differences in material expansion between aluminum housings, plastic components, and rubber seals further contribute to long-term fatigue and leakage. Although many documented cases involve hybrid variants of the A25A engine, the shared pump design means these failure modes are equally relevant to the A25A-FKS, making this a systemic issue tied to both engineering trade-offs and early manufacturing quality control. TOYOTA & LEXUS Vehicles Covered: 2018 TOYOTA CAMRY 2019 LEXUS ES300H 2019 TOYOTA AVALON 2019 TOYOTA CAMRY 2019 TOYOTA RAV4 2020 LEXUS ES300H 2020 TOYOTA AVALON 2020 TOYOTA CAMRY 2020 TOYOTA HIGHLANDER 2020 TOYOTA RAV4 2021 LEXUS ES250 2021 LEXUS ES300H 2021 TOYOTA AVALON 2021 TOYOTA CAMRY 2021 TOYOTA HIGHLANDER 2021 TOYOTA RAV4 2021 TOYOTA RAV4 PRIME 2021 TOYOTA SIENNA 2021 TOYOTA VENZA 2022 LEXUS ES250 2022 LEXUS ES300H 2022 LEXUS NX250 2022 LEXUS NX350H 2022 LEXUS NX450H+ 2022 TOYOTA AVALON 2022 TOYOTA CAMRY 2022 TOYOTA HIGHLANDER 2022 TOYOTA RAV4 2022 TOYOTA RAV4 PRIME 2022 TOYOTA SIENNA 2022 TOYOTA VENZA 2023 LEXUS ES250 2023 LEXUS NX250 2023 TOYOTA CAMRY 2023 TOYOTA RAV4 2023 TOYOTA SIENNA 2023 TOYOTA VENZA 2024 LEXUS ES250 2024 LEXUS NX250 2024 TOYOTA CAMRY 2024 TOYOTA RAV4 2025 LEXUS ES250 2025 LEXUS NX250 2025 TOYOTA RAV4 More About BundysGarage: https://goo.gl/qv3Wzc Questions, Comments, Concerns: bundysgarage@gmail.com Twitter: https://twitter.com/bundysgarage @bundysgarage On The Web: http://www.bundysgarage.com Music by Randall Kent: As seen on NCIS https://youtu.be/iYwsjia4GtI All Rights Reserved 2026 © Copyright 2026 Bundys Garage All rights reserved. This material may not be published, broadcast, rewritten or redistributed in whole or part with out the express written permission. Contact: bundysgarage@gmail.com DISCLAIMER - DISCLAIMER - DISCLAIMER Due to factors beyond the control of BundysGarage, it cannot guarantee against unauthorized modifications of this information, or improper use of this information. BundysGarage assumes no liability for property damage or injury incurred as a result of any of the information contained in this video. BundysGarage recommends safe practices when working with power tools, automotive lifts, lifting tools, jack stands, electrical equipment, blunt instruments, chemicals, lubricants, or any other tools or equipment seen or implied in this video. Due to factors beyond the control of BundysGarage, no information contained in this video shall create any express or implied warranty or guarantee of any particular result. Any injury, damage or loss that may result from improper use of these tools, equipment, or the information contained in this video is the sole responsibility of the end user and not BundysGarage nor any of it’s subsidiaries.