[xozxro]

Hello,

So, $900 later, I'm still right where I started.

I've replaced my rear rotors, rear pads, and rear calipers, all for this sound to persist:
https://youtube.com/shorts/_ArxIG70W64?feature=share

I brought it into a shop after the rotors and pads were done by me, and they confirmed calipers were sticking... so they replaced them.

The shop gave it back saying there was no sound, but there is. I call them 20 seconds down the road, they aren't sure why it's still there, I drive on it for an hour, same sound, I call again and now their tech apparently heard something from the front, after replacing calipers.

WTF?

So I took this video. Clearly coming from the rear. All brake components are clearly fresh. Calipers, rotors, and pads. Any ideas as to this? I have to drive the car two hours away tomorrow.. so I'm putting it up now to see if there's anything I can look for based on ideas given to me here. My current points of inspection are now are axels, something with diff, anything with drivetrain etc...

Please let me know if anyone has even the slightest inclination. I just want the problem gone. That's why I paid them an arm and a leg to deal with it, instead of doing it myself... and yet, now here I am. This is why I never go to shops. Lol.

Thanks for ANY help in advance.

[335i54n]

dust shield rubbing around the ebrake shoes, theres a channel the rotor sit in iirc

[whyzee125]

Agreed, that definitely sounds like a dust shield scraping and not a creak. Pull the wheels off and check. Could be loose ebrake hardware inside one of the drums too.

[steifan]

The sound is a bit "springy" as well (to my ears, well trained in E46 parking brake noise), might be parking brake shoes being too close to the inside of the brake disc (the drum part). Should sound much worse if any parking brakes components have come loose though.

[xozxro]

Originally Posted by steifan

The sound is a bit "springy" as well (to my ears, well trained in E46 parking brake noise), might be parking brake shoes being too close to the inside of the brake disc (the drum part). Should sound much worse if any parking brakes components have come loose though.

Originally Posted by whyzee125

Agreed, that definitely sounds like a dust shield scraping and not a creak. Pull the wheels off and check. Could be loose ebrake hardware inside one of the drums too.

When I replaced my brakes - made sure E brake wasn’t the issue via adjusting. Checked dust shields when issue first began as well. Had the same thoughts… but it seems to be the U joint between the driveshaft and the diff actually.

It took me 10 minutes to figure it out when determined, and with my car on jacks. I mean seriously, the diagnostic ability of a $125 hour shop was next to nothing.

[540guy]

Sound like dust/stone shields to me as well.

I had this problem on my 540. The metal under the bolts that hold the shield to the assembly rots out. The bolt is still tight, but the shield is now free to move. This drove me absolutely insane listening to this on nice summer nights with the windows down .. ting, ting, ting - or when driving in an underground garage tinig, ting, ting.

Dealers and repair shops almost never hear the sound because their shops are open 7am-6pm, with lots of shop & street noise masking anything subtle.

[gunnerxq]

Maybe it's squeaky bushings? I had a rubber boot tear and did this "fix" two years ago. No squeakyness or performance issues since, nothings loose or anything.

[xozxro]

Originally Posted by gunnerxq

Maybe it's squeaky bushings? I had a rubber boot tear and did this "fix" two years ago. No squeakyness or performance issues since, nothings loose or anything.
https://youtu.be/xxyqamNmWH4

Yeah one would think it’s an option. But appears to be U joint between drive shaft and diff.

That being said, I would recommend silicone grease on bushings that squeak. Have had the same issue, went through same process in video, but silicone grease is safer for bushings haha.