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Groaning sound when backing up first thing in the morning.

hcdavis3

HCD3
Mar 3, 2019
1,831
1,068
02571
It sounds as if the brake pads were stuck on the rotors. It’s kinda like the sound when the pads really are stuck after rain and sitting for a couple of days. Anyone else? Thanks very much.
 

G26okie

2020 P3D-
Nov 15, 2019
160
108
South Florida
Probably a product of using regen braking vs cleaning off the rotors with the regular brakes. I get it as well after a day if it was wet. Turn regen off for a little braking and clean them off.
 

hcdavis3

HCD3
Mar 3, 2019
1,831
1,068
02571
Probably a product of using regen braking vs cleaning off the rotors with the regular brakes. I get it as well after a day if it was wet. Turn regen off for a little braking and clean them off.
Thanks I’ll try that. In my case it’s been making that noise when it’s dry out. I don’t think the pads are stuck to the rotors.
 

eli_

Member
May 14, 2018
275
450
Bellevue, WA
It worth noting that you shouldn't need to do that because the car has disc wipe feature, it occasionally applies imperceptible braking force just to wipe the rotors without you noticing.
 
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Reactions: hcdavis3

hcdavis3

HCD3
Mar 3, 2019
1,831
1,068
02571
It worth noting that you shouldn't need to do that because the car has disc wipe feature, it occasionally applies imperceptible braking force just to wipe the rotors without you noticing.
Thanks a million Eli. This just started. I don’t think it’s the brakes. I think it may be the rear drive motor. I’ll check it again tomorrow morning and see if it persists. I Was not clear as to the sound in my original post. It’s more like moaning sound. Not pads stuck to rotors.
 

focher

Active Member
Oct 15, 2013
1,007
1,444
Bay Area
The pads definitely stick after getting wet and then drying without much, if any use. It should be a quick feel of the pad unsticking, not an ongoing sound.

There's another issue that we Performance owners have experienced, which is having small pebbles or pieces of other debris finding their way in between the pad and the rotor. That's a horrendous, scraping sound that seems different than what you describe. It's fixed with a quick couple of hard braking or going in reverse then hard braking.
 

jkoya

NA2 NSX
Nov 21, 2018
3,626
1,553
Northern CA
Thanks a million Eli. This just started. I don’t think it’s the brakes. I think it may be the rear drive motor. I’ll check it again tomorrow morning and see if it persists. I Was not clear as to the sound in my original post. It’s more like moaning sound. Not pads stuck to rotors.

Any updates - did the noise return ?
 

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