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Terrible brake noise when reversing

dgstan

Member
Jun 28, 2018
379
275
Campbell, CA
Every morning, when I back out of my garage, there is a horrible squealing when I put on the brakes. It is very loud and must drive my neighbors crazy. The car is 6 months old and did not make this noise when it was brand new.

After a moment, the brake noise goes away (perhaps after the rotors make one rotation under pressure). If I use the car a few hours later, the noise does not occur. It seems to be after an extended time, like overnight. I can't imagine my brake pads are bad. The noise is not similar to what one would hear when the pads are low and the metal tab is rubbing.

I've been hoping it would go away as the brake pads get more broken in, but it hasn't. I've had this on other cars occasionally, but it would usually go away after a little bit, but this persists. Driving forward, there are no noises whatsoever.

Are others experiencing this? Does anyone have a solution?
 

dgstan

Member
Jun 28, 2018
379
275
Campbell, CA
Recently?

Has it been raining where you live?

No, it hasn't been raining. I get the exact same noise if it's early in the morning (cold) or later, once it's warm. I'm in the Bay Area, so the weather is very temperate. This has been going on for a few months.

I'm hesitant to call Tesla since this will inevitably be something they can't reproduce, since it only happens after the car sits for 12+ hours.
 

jboy210

Supporting Member
Dec 2, 2016
4,970
3,046
Northern California
Can you elaborate how recent rain would cause the noise?
Rust. Disk brake rotors are made of steel with a high iron content. When it rains or is humid, water can condense on the rotor and rust it. When this happens and you give the brake pedal the first few presses the brake pads make contact with the rusted material and make a scraping sound until the scrapes it off.

With ICE cars you usually have a shorter occurrence of this noise since their pads are usually lightly touching the rotors even when you are not pressing on the brakes. Also, without regen braking, ICE vehicles use the disk brakes to slow much more often.

FWIW, I live in the SF East Bay Area and it happens to my X all the time until the warmer months.
 
  • Informative
Reactions: srlawren

Shateam

Member
Apr 13, 2016
585
539
NJ
Rust on the rotors (from a rain event for instance) would be more of a quick “clank” noise.

OP says it’s more of a high pitched squeaking.
 

DanDi58

Member
Jun 22, 2020
757
561
Dayton NJ
No, it hasn't been raining. I get the exact same noise if it's early in the morning (cold) or later, once it's warm. I'm in the Bay Area, so the weather is very temperate. This has been going on for a few months.

I'm hesitant to call Tesla since this will inevitably be something they can't reproduce, since it only happens after the car sits for 12+ hours.
Have someone standing outside next to the car record it as you back up.
 
  • Like
Reactions: jboy210
Sep 23, 2020
480
411
Sacramento CA
You're going to go crazy trying to duplicate this under perfect circumstances.

I would take a deep breath and make a service appointment. The car will easily sit for 12 hours if it gets dropped off in the evening.

Even if you somehow figure out (or get a decent idea) what this may be prior to a SC appointment, they're still not going to do the fix unless they duplicate it. These SC's won't do a thing based on owner reporting and owner hypotheses.

Good luck !
 
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