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26 Posts
Discussion Starter #1
2018 LE-

Three times over the past 6 months I have gone back into the garage hours after parking the car (in one case the next day) and hear a buzzing sound coming from somewhere under the floor in the car- I can hear it the loudest if I listen below the car on the middle/right side. In each case if I turn the key to on/off the sound stops.

It definitely seems like something electrical that is running- which is disturbing.. I feel lucky to have caught it each time..

Has this happened to anyone else, or any ideas what this might be?
 

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2019 Toyota Highlander LE AWD
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34 Posts
It usually happens 6 hours or so after being parked. the car is running a systems check on the emissions or something or another. Cant find the thread but it is normal.
 
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