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RX - 4th Gen (2016-2022) Discussion topics related to the 2016 and up RX350 and RX450h models

Missing Coolant Reservoir Cap?

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Old May 22, 2026 | 05:14 PM
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Default Missing Coolant Reservoir Cap?

Could someone please tell me if this is a coolant reservoir for a 2017 RX350 and it's missing a cap? Please post a picture of yours and would greatly appreciate it if you know where I can find an aftermarket replacement or OEM part #. Thanks.

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Old May 22, 2026 | 05:39 PM
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[size=13px]Coolant reservoir cap is about $6 at your local Lexus or Toyota parts desk or on Amazon, not a critical item you can keep driving car for a few days until you get one or cover the hole with a cloth rag, zip lock bag etc until cap is purchased.[/size]





Last edited by 6runner; May 22, 2026 at 05:45 PM.
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Old May 23, 2026 | 06:32 AM
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Originally Posted by 6runner

[size=13px]Coolant reservoir cap is about $6 at your local Lexus or Toyota parts desk or on Amazon, not a critical item you can keep driving car for a few days until you get one or cover the hole with a cloth rag, zip lock bag etc until cap is purchased.[/size]



Thank you for information!
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