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Before I start, I have read this thread and it doesn't help Toyota Highlander 2015 rattle sound at (cold) start.

For the past few months, my car started making a rattling/knocking sound (Don't exactly know what to call this sound) when the engine starts. But, it doesn't happen always and there is no specific pattern. It doesn't appear to be a starter motor problem either. Since it is random, the mechanics can't reproduce it.

I am attaching video links to three recordings where you can hear the sound easily.

https://youtube.com/shorts/5-acCN6g3YE?feature=share

https://youtube.com/shorts/VxSB91qMKig?feature=share

https://youtube.com/shorts/nSKsJCLHJVo?feature=share

Please help me understand what could be the problem.

Ali
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1 Answers1

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One possibility is a fault with the starter motor.

The front bearing of the starter may be worn, allowing the shaft and/or pinion to rattle once it disengages from the ring gear on the flywheel.

HandyHowie
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