Hi All. New guy. I've got an '89 325i and an '04 S4, so I have plenty of car problems. Now, my girlfriend's Cooper has something I've never seen before.

She's had the car for about 2.5 years - '04 Cooper CVT. For the majority of that time, or maybe all of it, it's had a chirp sound from the passenger-side rear, like a bird going cheep-cheep-cheep-cheep. It has no correlation to road speed or engine RPM, just a constant birdy sitting back there from idle to road speed and everywhere in-between. She's starting to get mad at me for not fixing it so I need your help!

She actually took it to a mechanic about a year ago who told her the brake caliper was "warped." Any creedence to that theory? Since it's not linked directly to speed or braking, I didn't think it was, but could it be a hydraulic chirp? My only other thought was something fuel-pump related, but that may not even be the correct side of the car for the pump.

Any/all suggestions are welcomed - thanks everybody.

 

Anybody have any ideas?

 

We have the exact same issue with our Mini. Did you ever figure out the problem??

Thanks!

 

My new to me 2007 MCS has this too. Looking through other threads it looks like it may be the leak diagnosis pump or leak detection pump. The other threads have video links and the sound in the videos is exactly the sound I am getting.

-Alden

 

Thanks I ordered the part, will let you know if it works!

 

I had this problem, and it turned out to be the seat back/belt rubbing against the wall. Flipping the seats down solved the problem.

I thought it was something in the dash. I literally ripped out the pass. side dash panel at a red light trying to get rid of it... I got a few weird looks