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Mazda5 Suspension



  • slurpslurp Posts: 8
    Mazda Canada sent my dealership the "good will" replacement parts for my rear suspension and lo and behold what did we see in the box? A whole new sway bar assembly! The service manager,parts guys and myself observed that the bushings on this new part are absolutley massive compared to what originally came installed on my vehicle. ( ie. over twice to three times as large in all dimensions!!)We also observed that the sway bar looked slightly larger in diameter. While we were oogling the contents I asked if this part is what is now installed on the redesigned 2012 model. Nobody was sure so we went to the show room and crawled underneath a new M5 and sure enough they look exactly the same. Hmmmmm.
    While I was waiting for the new parts to be installed I also asked if the shock absorbers in the 2012 would fit my 2007 because the Mazda web site in Canada goes to great length to describe how although the 5's suspension is based on the Mazda3 it has been extensively reengineered to accommodate the added mass of the 5. They make specific mention of the redesigned shock absorbers ( better to absorb thermal load from greater mass) and how the bushings and sway bar etc have also been beefed up. At first glance it would appear that the new shocks would fit the older vehicle. I say again hmmmmm. To bad my OEM shocks failed at 53000 km!
    With all this said I must say that I think they may have finally solved my rear suspension issues but I guess time will tell ( We'll see what happens when the temperature drops to -35celcius). The vehicle has not handled this well since my wife and I bought it back in September of 2007. It would appear that Mazda has learned some lessons from the past generation of the 5 and made some much needed improvements. It's to bad that these simple changes could not have been made years sooner when problems first started cropping up.
    Finally I would like to thank the service manager at my dealership for helping me advocate for a real solution to my problem and yes also to Mazda Canada for supplying the replacement parts. I will keep you posted as to how the new parts fair over the next few months.
  • davichodavicho Posts: 190
    Thanks for the info. Please keep us posted on the results of this fix. If it is a permanent fix, I will buy the part/s and install them myself. Were you able to get a part number on the replacement sway bar kit?
  • slurpslurp Posts: 8
    The part number I have on my invoice is C2Y6-28-10XA. Interestingly this number was supplied by the Mazda's service rep to my dealership's service manager and can not be found in the parts dept. system yet . I think that because this may be a bit of an experiment on Mazda's part they may want to see if this works before authorizing it for general circulation? Who knows but there you are.
  • davichodavicho Posts: 190
    Thank you very much slurp...I will keep it handy and see if I can get info on it as well. Please do report back and keep us posted on the outcome of this fix.
  • trishr1trishr1 Posts: 75
    This is what Impex says about the part number. Perhaps it is from another similar vehicle like Madza3? ;)


    ( OEM part number: C2Y6-28-10XA / C2Y62810XA )

    List Price: $86.94 :: Impex Price: $66.07

    Availability: Typically ships in 1-3 days
  • davichodavicho Posts: 190
    I also called my buddy at Riverside Mazda and the part number came up on his billing mainframe but when he try to run it on the Mazda ordering/cataloging program it came up as invalid and he couldn't see what vehicle it applied to either. It may be too new yet for the dealers to have info on this part/fix. It could be in the early stages of becoming the official replacement part for the rear suspension noise bulletin. I guess we will have to wait a little longer and check back again. My other question is if and when they release this part, is it going to come complete with bushings, brackets, and perhaps links if the original links do not work??
    Lets keep this thread updated as info becomes available...
  • slurpslurp Posts: 8
    Like I said in my earlier post after looking underneath a new M5 I'm pretty sure its just the 2012 Mazda5's new and improved part. I didn't mention in my earlier message that the service manager and I looked at the sway bar assembly for a new 2011 Mazda 3 and they were defineately different from the replacement part I recieved. But who knows I suppose anything is possible.
  • davichodavicho Posts: 190
    We got some rain last week and my rear end started squeaking. I looked up the TSB once again and got the part number from the bulletin (#C243-28-156-C). I called my buddy at Mazda and gave him these part numbers to check if he had them in stock. He told me that they had been superceded to #C243-28-156-D and that he had two in stock, so I picked them up and I noticed that these new updated bushings seem to be a bit harder in consistency and they also have ridges on the inside where they meet the sway bar in contrast to the ones I had on. Hmmm, we will see.
  • slurpslurp Posts: 8
    Good evening from Winnipeg. I had those particular bushings( ie. 156 - D) installed at the begining of August and they were already starting to squeak when I recieved my new sway bar assembly early last week. I hope yours last longer than my did.
  • Hello,

    I know that I am replying to an older post but have recently developed the same noise you described (clunking) coming from the rear end that sounds like something is loose and knocking the car frame.

    Did you ever find out what that noise was? and were you able to get it fixed?

    Thanks in advance.
  • davichodavicho Posts: 190
    We will see how long they last. I live in sunny SoCal and the only time they start to squeak is when they get wet like when it rains. After the rain stops it takes about 3-5 days and then they stop squeaking. We will see. Keep us posted on your massive rear sway bar/beefy bushing replacement. Thanks!
  • davichodavicho Posts: 190
    If I am not mistaken the rear clunking noise relates to a weld spot (knub) that has to be grinded off because it dis-places the seat of the suspension spring. Have it looked at, that should be the fix.
  • davichodavicho Posts: 190
    New rear sway bar bushings did not work. In fact they are noisier then the old ones.... :mad: back to the drawing board. I love my MZ5 but I really wished Mazda would find a definite and permanent fix for this rear horrid suspension squeak...
  • davichodavicho Posts: 190
    So I decided to spend another $25 and bought the new "beefier" 2012 Mazda5 rear sway bar bushings and braces. I had to use my dremel to bore out the inner part of the bushing to make it fit, but after a few passes I was able to make it fit nice and snug. Noise is still there.... :mad:

    I also tightened all the bolts in the rear suspension as one dealership had reccomended but...nothing.

    Ahh somebody please find the permanent fix for this... :cry:
  • davichodavicho Posts: 190
    I think I finally found the culprit to the legendary rear squeak noise while driving slow in uneven surface.

    Its not:

    the control arms
    the sway bar bushings
    or shocks

    Its none other then the upper rubber seat for the spring. The noise comes from the spring rubbing on the rubber seat. I pulled the spring out, cleaned the surface and applied heavy duty white lithium grease from an actual jar with a brush (do not use the weak spray can form it doesnt work) and I applied it generously. Installed the spring back in there and voila! No noise.

    Now... it may not be a permanent fix but it will certainly silence it for while. I may pull it again when it starts doing it again and I plan on wrapping the upper two three coils with heavy duty teflon tape and adding more grease. I hope this certainly cures the issue once and for all. Just thought I'd share for anyone that is interested. ;)
  • slurpslurp Posts: 8
    I hope this cures the problem as well but I think that what you have found is a problem that over time has been caused by the poor design / specification of the control arms,sway bar bushings and shocks. In my case when the sway bar bushings were replaced the old ones were absolutely deformed and shot.

    I think what was happening, in my situation anyway, was that because the bushings were not holding the sway bar tightly enough, the rear suspension was actually bottoming out over larger bumps (causing the coil springs to fully contact each other) and thus causing the loud "poing" when the spring released in addition to the annoying squeak.

    I'm curious to know why you chose to enlarge the opening of the new bushings as you mentioned in an earlier post. It is my understanding that the sway bar should be held firm and not turn freely inside the bushing or else the excess movement of the sway bar reduces it's effectiveness. Did you try to install the "beefier" bushings "as is" first?

    Since I had the replacement sway bar assembly installed back in September (ie. slightly larger sway bar and beefier bushings...see earlier posts) my Mazda 5 hasn't made a peep from the rear end...yet!! I guess time will tell. Anyway I hope I'm not coming off as preachy because I want the problem solved as much as you do . I just think that Mazda under speced some of the rear suspension components on the 06 - 10 models. It just seems suspicious to me that the 2012 model Mazda 5 has a slightly larger rear sway bar, bigger sway bar bushings and redesigned shocks. Take care davicho.

  • davichodavicho Posts: 190
    Hello slurp, thanks for chiming in...I have been very relentless in solving this annoying issue and I totally agree that it stems from poor design. Unfortunately for us first gens the issues will remain while the 2nd gens (hopefully) will have them solved.

    At any rate, the reason I bored out the new (2012) style bushings was because they would not fit on the old (2006-2011) style sway bar. The new bushings have a squared hole with a lot more rubber (beefier) around it hence replacing the bigger u-clamps as well. I will assume that the new style rear sway bar has a square notch right where the bushings mount, hence the squared hole on the bushings. While I did bore out the inner hole to fit my sway bar. I did it slowly and a little at a time so that i wouldn't over-bore. Believe me these bushings are on "tight". Well tighter then the old ones. They are so tight that I had to use grease to be able to slide the clamp over them and secure it to the subframe. I dont know if greasing the upper spring seats were the answer or if it was a combination of both...greasing the seats and the beefier bushings, but the noise it completely gone for now...I mean not a single peep. I guess time will tell.
  • I would like to know did you get the answer also. Have you had any other problems with fron tend wearing your front tires. Im going on my third set of tires. i got a 09 mazda 5.
  • What do FE mean? Thanks gang.. :)
  • Had a 2007 touring and now have a 2009. Both started creaking around 44k (of course after warranty). Anyone ever touch base with Mazda about the problem?
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