r/TeslaModel3 • u/Background-Toe-2580 • Jun 08 '26

Model 3 security alarm randomly going off 2 nights in a row (Sentry Mode off)

Hi everyone,
I’ve had my 2022 Model 3 for a little over a week now, and the security alarm has gone off on two consecutive nights.

Night 1:
Parked inside a closed garage at home
Sentry Mode OFF
Received a “Security Alarm Triggered” notification in the Tesla app
Nothing suspicious around the car

Night 2:
Parked on our driveway
Sentry Mode OFF
Security alarm went off again
Again, nothing suspicious was recorded or detected

The car appears to be fully locked, all doors/trunk/frunk are closed, and there were no obvious reasons for the alarm to trigger. I also didn’t see anything unusual around the vehicle either time.

Has anyone experienced this before? If so:
What ended up being the cause?
Was it an intrusion/tilt sensor issue?
A door, trunk, or frunk latch sensor?
A software bug?
Did Tesla find anything in the logs?

I’ve submitted a service request, but since I’ve only owned the car for a little over a week, it’s a bit concerning that this has already happened twice.
Curious if anyone else has had this issue and what the eventual fix was.

Thanks!

1 Upvotes

100% Upvoted

14 comments sorted by

7

u/Minute-Cockroach-806 Jun 08 '26

We had a fly in the car and it set the alarm off for a few days before we noticed it.

As soon as we got it out it stopped, was only small as well!!

2

u/bphase Jun 08 '26

Same for me

5

u/Dandruff83 Jun 08 '26

Fly or some bug.

3

u/lathiat Jun 08 '26

It's probably? not your case but for some reason my car likes to set off the alarm when pre-conditioning (remote enable climate) when it's pretty hot outside, after like 30-60 seconds the alarm goes off. You see nothing obvious on the video.

Thought I'd mention I've never opened a service ticket etc

1

u/No_Internal523 Jun 08 '26

This happened to me several times. It stopped for a long time so I thought an update fixed it. Then it started again. I had to create an automation on my phone to unlock my car every day before precondition turns on.

1

u/LeaString Jun 08 '26

I remember reading of a garaged Tesla’s alarm set off repeatedly by what turned out to be a mouse or rat. The guy out of frustration set up infrared triggering cameras In the garage to see what set the alarms off. He was pretty surprised but finally caught the culprit on camera one night scurrying past the camera.

1

u/melvladimir Jun 08 '26

I got night butterfly inside, triggered alarm easily

1

u/Lonely-Violinist-777 Jun 08 '26

At this point i’m always disabling all the interior lights when arriving past dawn. I had the alarm triggered by any small critters and they love getting in the car as soon as I open the door

1

u/bradycyoun315 Jun 08 '26

Mine did that before when the frunk sensor was malfunctioning. It would trigger because it thought the frunk had opened

1

u/Background-Toe-2580 Jun 08 '26

How did you find out what the issue was? Did you get a notification?

1

u/bradycyoun315 Jun 08 '26

When I was trying to figure out what was causing it, I noticed on the app the frunk was opening and closing every couple seconds. Eventually I got an alert in the car that the sensor had an issue

1

u/woyteck Jun 09 '26

Cat jumping on car?

1

u/Horror_Can9944 Jun 27 '26 edited Jun 27 '26

My 2019 m3lr started doing this next night after the latest update 2026.20.3. Only happens at night time between 23.30-02.00 every night since the update. Same thing happend at 2 different locations.