Loud "purge-like" or pressure release sound from car

consultadrone

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Joined
Jan 23, 2020
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Location
Southern California
Car(s)
2020 Supra
Twice, yesterday, my car made a loud, almost purge-like sound. First time it happened, while slowly coming to a red light with the windows open, it sounded like the rear driver-side tire suddenly and rapidly deflated. Startled the crap out of me. Second time it happened after I parked the car in the garage, had shut it down and was grabbing bags from the trunk. Almost sounded like the EVAP system purging or releasing pressure??? Never heard it before. Anyone else?

It's a 2020 I've owned since new. Still entirely stock (no tune, etc). Just had the latest iLevel release installed to solve a throttle hesitation issue. No change to the cars driving characteristics at all, no warning lights, nothing at all notable besides the loud sound.
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