Issue or normal? Parking brake sound for Model 3

[modl3mike]

My car makes a whirring sound when engaging or disengaging Park. Is the sound in the clip below normal?

https://imgur.com/a/OcR65Zq

 

[GtiMart]

The parking brake function is handled by small electric motors/actuators on the rear brake calipers. Yes, it is normal to hear that type of sound when entering and exiting park.

 

[Arthur31]

Totally normal. Both of our cars make the same noise.

 

[modl3mike]

Good to know. thanks!

 

[DocHolliday]

In the clip I don't think you have engaged the parking brake, just put the motors in Park. If you press and hold the button while in Park, you'll hear another sound from the rear and see a red ((P)) indicating the parking brake. I hardly ever use it but it would be useful if parked on a hill.

 

[GtiMart]

Both of those cases, pressing park and holding park, use the same electric brake at the back. Putting the "parking brake" just forces those little motors a bit harder.

 

[gearchruncher]

Putting the "parking brake" just forces those little motors a bit harder.

It doesn't force them any harder. It just activates it like normal. It will re-activate it even if in park (and thus the brake is already set), but it doesn't add any voltage or anything else that makes it stronger.

The primary use of parking brake is in motion if you need an emergency stop. The real reason for it is that it's required by law to be manually controlled, even if the car completely automates it for you.

 

[archae86]

That sound resembles the sound my rear view mirrors make on my 2022 Model Y when retracting or deploying.