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Hissing sound under the trunk


New Member
Nov 10, 2019
I'm a new Model 3 owner (9/2019), not sure if this is a normal issue...I couldn't find anything in the search...

When driving on a local road yesterday, I suddenly heard a very loud hissing sound from under the passenger side of the trunk. I thought I had a flat, so stopped and looked, but the tire was fine. The sound was coming from near the rear wheel, but I couldn't tell exactly where. There was no drip or draft that I could see or feel. I wasn't sure what to do, so just waited there to see what would happen. After about 3 minutes or so, the hiss sputtered and gurgled and stopped. I checked to see if the car was driveable and it felt normal. I opened a service request but they couldn't fit me in till next week. A fellow owner suggested that it could be the BMS (Brake Management System) relieving some pressure, but I'm a bit skeptical.

I wish I had the presence of mind to record it, but I didn't ..

Has anyone experienced anything similar that can clue me in?


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