If your 5th Gen (2019-2024) (gasoline) Toyota RAV4 is showing "Engine maintenance is required" message, most likely you need to replace "Bypass Coolant Valve". Follow this video if you wanna save money and time doing this job. Toyota dealerships will ask for at least $800 for this fix. If you do it on your own, it won't go beyond $200 with all of the tools and parts. This tutorial will go in details on how to replace this part, even with little to no experience you'll be able to do this fix on your own.

Estimation of this work to be done: 3-4 hours depending on experience level.

Buy me a coffee:
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Here's list of products used in this video:

Bypass coolant hose with valve part# 16260-F0010
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or
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Radiator Coolant Filling Funnel Kit
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Toyota OEM coolant (pink)
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Flexible Hose Clamp Pliers Tool
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Socket wrench set
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Wire cutter:
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Long nose pliers
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Zip-ties
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Disclaimer: DO IT AT YOUR OWN RISK. I take no responsibility if you void your car's warranty. I don't work for any of the producers/companies that made these parts nor I'm here to endorse them. I simply provide guides on how to install these parts. Also I try to provide a good product that I'm using for my fellow 5th gen RAV4ers to save them time/hassle doing a research or buying wrong products.

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