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

Engine knocking

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Aug 11, 2025 | 07:00 AM

#1

liova

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1st Gear

Joined: Aug 2025

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Engine knocking

Hi guys someone had problem with cold start engine it was starting knocking like hammer then get warm it’s gone rx450h 2016

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Aug 11, 2025 | 07:20 AM

#2

Clutchless

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From: VA

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Welcome to CL. How many miles are on it? When was the oil changed? Have you checked the oil level? How often do you change the oil? How long have you had the noise and the car?

See these threads which discuss your issue: https://www.clublexus.com/forums/hybrid-technology/943203-cold-startup-knocking-sound.html

https://www.clublexus.com/forums/rx-...-knocking.html

https://www.clublexus.com/forums/rx-...ine-noise.html

https://www.clublexus.com/forums/rx-...nger-side.html

Last edited by Clutchless; Aug 11, 2025 at 07:26 AM.

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