Results 1 to 3 of 3

Thread: 2011 CX-9 LF possible brake noise?

  1. #1
    Registered Member

    cx9

    Join Date
    Aug 2018
    Location
    wisconsin
    Posts
    3

    2011 CX-9 LF possible brake noise?

    I don't get it, I just don't.

    Brakes were new a year ago, this year they started making noises. Sounds like a radial noise so only happens on a certain rotating part. The noise is like a groaning or like a rusty rotor and brake pad brushing up on each other, kind of like qwoosh, qwoosh, qwoosh sound. Used to only happen when braking, but wife complained about it yesterday so i took it out and it happened while off the brakes as well. :/...hmm.

    Every time I investigate by taking the two caliper pins (they are lubricated still) out and removing the pads, put them back in they are fine for a week or so. Rotors look good, wheel bearing and hub replaced a bout a month or two ago, pad material is about 3/8" on both pads, and oh, forgot to put the dust shield back on so its not that. The only other rotating assembly I can think of is the axle shaft, but the boot isn't torn and I havent noticed loss of MPG so I don't think its binding.

    Any thoughts?

  2. #2
    Registered Member

    2008 Mazda CX-9 Touring FWD . 2014 CX-5 GT FWD

    Join Date
    Dec 2007
    Location
    Chicago
    Posts
    162
    Quote Originally Posted by yangstylz View Post
    I don't get it, I just don't.

    Brakes were new a year ago, this year they started making noises. Sounds like a radial noise so only happens on a certain rotating part. The noise is like a groaning or like a rusty rotor and brake pad brushing up on each other, kind of like qwoosh, qwoosh, qwoosh sound. Used to only happen when braking, but wife complained about it yesterday so i took it out and it happened while off the brakes as well. :/...hmm.

    Every time I investigate by taking the two caliper pins (they are lubricated still) out and removing the pads, put them back in they are fine for a week or so. Rotors look good, wheel bearing and hub replaced a bout a month or two ago, pad material is about 3/8" on both pads, and oh, forgot to put the dust shield back on so its not that. The only other rotating assembly I can think of is the axle shaft, but the boot isn't torn and I havent noticed loss of MPG so I don't think its binding.

    Any thoughts?
    1. New brake pads or new rotors and pads? If only pads, get under the car and check out inside surface of rotors as they may be pitted before the outsides show anything. (I had this happen)

    2. It's entirely possible the new bearing or hub is bad. Of course the bearing sound will be more of hum that increases with speed, not a whoosh whoosh.

    3. A bad CV joint (axle shaft) will sound off primarily when turning sharply and will click. You don't describe that symptom.

    If I had to guess, I would say it's the brakes and likely a sticking caliper or rotor flaw of some kind. (no, rotors don't warp but can come defective)

    Anything brake-related should be able to be heard or seen with the wheels jacked up and spun by hand. Use wheel blocks and jack stands to get both front wheels in the air to test.

  3. #3
    Registered Member

    2010 CX-9

    Join Date
    Jul 2010
    Location
    L.I., NY
    Posts
    108
    Stuck caliper - had it on my 2010 - front right - replaced last year and it happened again a month ago so I replaced it again -
    2010 CX-9 GT AWD w/navi - Copper Red/Sand - Bought 6/25/10

Similar Threads

  1. Smart City Brake and Brake pedal noise?
    By bmninada in forum CX-5 Lounge
    Replies: 0
    Last Post: 08-18-2016, 09:20 AM
  2. Brake Booster CX-9 2011
    By mr_esmit in forum CX-9 Engine & Transmission
    Replies: 0
    Last Post: 07-18-2016, 12:24 PM
  3. Buzzing Noise on 2011 Brand New CX-9?
    By ozcx9 in forum CX-9 Engine & Transmission
    Replies: 13
    Last Post: 12-30-2014, 03:59 PM
  4. 2011 CX-9 GT: HELP wiring for trailer lights and brake controller?
    By deekboutique in forum CX-9 Accessories & Appearance
    Replies: 0
    Last Post: 07-20-2014, 11:32 PM
  5. Replies: 8
    Last Post: 11-17-2013, 11:35 PM

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •