Recently had brakes done and the sound was there prior to that. Breaks were squeaking and still do a bit. We were told that the bushings would need replacing soon. Any connection?
When backing up, very loud squeaking/rubbing sound. on 2002 BMW 330Ci
Bounce the car up and down, if the bushings are that bad you will hear them. Spray some lube on them and see if it quiets temporarily. If this loud squeaking is just from backing up, it is not the bushings but a bad wheel cylinder on a brake caliper could be the culprit. Check to see if 1 rotor is getting a lot more wear or grooving than the others. You said brakes were recently done, what did they replace? Pads and rotors both I hope.