Sudden brake lock

[RickLee]

So today while driving , it happened twice, when the brake suddenly locked .
It was raining and wet, was driving at around 30 km and slowing down to stop , i applied very light brakes and all of the sudden the car locks and the radio stopped for about 1sec. But the car returned normal right away. Another time was when i was going up hill and needed to stop, applied very light brake and suddenly the car locked but this time I didn’t noticed the radio stop. It almost feels like the traction control is kicking in but at the speed i was driving is hard to believe the car is skipping.
Has anyone experienced something like this?

 

[804son]

Could this be you are mistakenly seeing ABS pulsating as a lock up or skipping. How is the tread on your tires? If it's wet and it's the ABS kicking in. It's possibly the tires are very low on tread or bald. If it's not that, make a service appointment.

 

[jjrandorin]

From the few other posts you have on TMC, it looks like you have spacers on your vehicle?

 

[Operator64]

So today while driving , it happened twice, when the brake suddenly locked .
It was raining and wet, was driving at around 30 km and slowing down to stop , i applied very light brakes and all of the sudden the car locks and the radio stopped for about 1sec. But the car returned normal right away. Another time was when i was going up hill and needed to stop, applied very light brake and suddenly the car locked but this time I didn’t noticed the radio stop. It almost feels like the traction control is kicking in but at the speed i was driving is hard to believe the car is skipping.
Has anyone experienced something like this?

Miles on current tires? Condition of tires?

 

[Dangerous Fish]

On one occasion in one of our Model 3s I've had something like this happen, but at very low speed it crawling traffic. I was probably doing around 5 mph and without any warning the car just slammed on the brakes so violently I thought I'd hit something in the road I hadn't seen.
I've experienced nothing like it before or since. I've experienced AEB a few times at higher speeds (>20mph) but this felt more aggressive and violent.
Can't explain it and I just put it down to a one-off random event which I hope doesn't happen again.

 

[RickLee]

The car is brand new with less than 1000 km, tires well inflated. It was pretty sudden and abrupt that I believe no car should hv behave like that at the speed i was driving.

 

[804son]

Maybe check your notifications in the car for any errors. I assume it's not doing this any longer.

 

[RickLee]

Ok thanks, i will see if this will happens again or else i need to call for a service.

 

[jjrandorin]

The car is brand new with less than 1000 km, tires well inflated. It was pretty sudden and abrupt that I believe no car should hv behave like that at the speed i was driving.

You didnt answer the question about spacers I asked.

10 mm wheel spacer

Has anyone try putting 10 mm wheel spacer?

teslamotorsclub.com

If you have done something to the stock wheel setup, then have issues with sensors etc, before you make a service appointment you likely should address that. If you dont, dont be surprised if they tell you "we are not touching anything around tires / wheels as you messed with it".

 

[Gauss Guzzler]

The Automatic Emergency Braking system gets really nervous around traffic cones among other things. Perhaps what you meant by "radio stopped" is that there was a loud alert bell and a brief message on the screen?

 

[RickLee]

You didnt answer the question about spacers I asked.

10 mm wheel spacer

Has anyone try putting 10 mm wheel spacer?

teslamotorsclub.com

If you have done something to the stock wheel setup, then have issues with sensors etc, before you make a service appointment you likely should address that. If you dont, dont be surprised if they tell you "we are not touching anything around tires / wheels as you messed with it".

No spacers

 

[RickLee]

The Automatic Emergency Braking system gets really nervous around traffic cones among other things. Perhaps what you meant by "radio stopped" is that there was a loud alert bell and a brief message on the screen?

No, it literally black out the screen and stop playing for one or two seconds

 

[Gauss Guzzler]

Then your car is broken and needs service. No one here can help you with a condition that causes the screen and audio to shut down while the brakes lock up.

 

[RickLee]

Then your car is broken and needs service. No one here can help you with a condition that causes the screen and audio to shut down while the brakes lock up.

Yes i think so. Thank you