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New firmware causes MCU to reboot frequently due to aftermarket audio?


Active Member
Apr 5, 2012
For the first time in a long while, experienced a spontaneous console reboot when pulling out of our garage yesterday.

The car was operating - with the console display black and then beginning the reboot sequence on its own.

Since I've had a Model S since early 2013, I didn't worry about it - and expected everything to come back to normal once the reboot sequence finished.

New owners who haven't seen this before - could be in for a surprise, especially if this happens while driving...

We're on the 6.1 release - hopefully Tesla has fixed this in a later release.
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Reactions: Matutino


Nothin' left to do but smile, smile, smile
Jul 21, 2013
Sarasota , Florida
Version 2018.6.1 641efac was installed last week. My MCU randomly reboots since the update. I have deterred that it is rebooting about every two days since the update. It's not causing a problem anywhere I can see. Just annoying.
I have had the same results since installing this version. Three reboots since last week.


Lead Moderator
Apr 2, 2010
Ottawa, Canada
Had a spontaneous reboot yesterday while I was trying to follow nav lol.

Was surprised. Haven’t had a spontaneous reboot in a couple of years.


Nov 26, 2016
I took my car to the Tysons service center and they resolved MCU issue. Here is the solution:

Technician reflashed bluetooth module due to corrupt module data. Advised by engineering team if MCU still reboots after the reflash to perform a factory reset.

Note: I had to take the car to Safe & Sound to remove an aftermarket component i.e. a DSP controller that was installed in the cubby area so the service center could access the wires behind the MCU to troubleshoot the issue.
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Reactions: Xenoilphobe


Supporting Member
Aug 1, 2015
My car has also been rebooting the MCU more frequently lately, and i am also (still) on 2018.6.1.
Has anyone reporting this issue had a newer software package installed and seen a difference? I.e., does anyone have evidence that it is tied to the 2019.6.1 software update?
I have been eagerly awaiting the later software with improved Nav and improved Autopilot. But if that also resolves the MCU reboots, that will be a bonus.
Otherwise, maybe a service call is in order? Until recently, my car spontaneously rebooted only once or twice a year...

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