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Cadillac STS Forum - 2005 through 2012 Discussion, 2007 STS Harsh ride, struts, air shocks in Past Cadillac Vehicle Discussion; Yup. And it's firmer than my 2003 STS 1st car to implement the magnetic ride system (started on late 02 ...
  1. #16
    1BadCadSTS's Avatar
    1BadCadSTS is offline Cadillac Owners Connoisseur
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    Yup. And it's firmer than my 2003 STS 1st car to implement the magnetic ride system (started on late 02 build STS and Corvette)

  2. #17
    pjbizjak is offline Cadillac Owners Fanatic
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    Re: 2007 STS Harsh ride, struts, air shocks

    Can the suspension be reprogramed like the transmission or engine?

  3. #18
    dkozloski's Avatar
    dkozloski is offline Cadillac Owners 10000+ Posts
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    Re: 2007 STS Harsh ride, struts, air shocks

    Quote Originally Posted by pjbizjak View Post
    Can the suspension be reprogramed like the transmission or engine?
    It'd be a first on this forum.
    Don't mess with Binky Bear!


  4. #19
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    Re: 2007 STS Harsh ride, struts, air shocks

    in my experience I have yet to see a MRC shock go bad that wasn't leaking - that's about the only problem that can happen with them

    and to have all of them go bad at once would be almost as rare as hitting the powerball jackpot

  5. #20
    mckellyb is offline Cadillac Owners Enthusiast
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    Re: 2007 STS Harsh ride, struts, air shocks

    I found a pair of replacements, obviously not OEM, but new (likely rebuilt), on eBay for $600/pr.

    Painful, but less so.

    To check if the magnetic fluid is leaking out, swipe a bit of funk off the strut, and see if it'll stick to a magnet.

    Low tech, but should work. Might even be able to do it with a bit of toilet tissue, so you can see if it's actually attracted.

  6. #21
    pjbizjak is offline Cadillac Owners Fanatic
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    Re: 2007 STS Harsh ride, struts, air shocks

    Thanks for all your replies, but there is still something wrong. I took the car to the dealer and they said there are no leaks in the suspension(struts) but never took it for a test ride. The front suspension seems so tight even the smallest rise in the road is felt hard. The car was ok before I went south last winter and the car stayed in my heated garage up north(Ohio). My buddy was going over to my house and started the car every two weeks. One time the engine wouldn't crank, dead battery, had the battery charge and everything was ok. He was told to disconnect the battery and leave it disconnected until it was time to start the car. So the battery was disconnected and when I returned home in March I connected the battery so I could drive the car, that's when I noticewd the harsh ride. I checked the tires and they were ok. Does anyone think that disconnecting the battery for a period of time could have affected the computer programed MRC??

  7. #22
    dkozloski's Avatar
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    Re: 2007 STS Harsh ride, struts, air shocks

    It sure sounds to me like the tires are pumped up like basketballs.
    Don't mess with Binky Bear!


  8. #23
    Pjazz's Avatar
    Pjazz is offline Cadillac Owners Fanatic
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    Re: 2007 STS Harsh ride, struts, air shocks

    Sounds like you need to take it back to the dealer and have them ride with you so they can determine your problem. Usually a bad shock will give you a very bouncey ride but I'm not sure of the characteristics of the STS suspension when it fails.

  9. #24
    sztolcaddy is offline Cadillac Owners Member
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    Re: 2007 STS Harsh ride, struts, air shocks

    My STS05 has much harsher ride as well than my previous SLS93. I can switch between touring and performance
    suspension settings. On touring setting you can feel all the bumps on the road, i lowered pressure from 32 to 28 on the back and 29 on the front ones and it seems better. But generally, new STSs drive firm I think.

  10. #25
    curtc's Avatar
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    Completely different suspension tuned for a completely different purpose...past Seville's were designed for comfort 1st then performance, the STS is all about performance...much firmer ride for a reason.
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  11. #26
    EChas3's Avatar
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    Re: 2007 STS Harsh ride, struts, air shocks

    Buyers looking for a compliant ride should not buy MRC-equipped STS; especially not AWD-MRC-equipped 1SG.

    Tire choice is important, too. I used to think Michelins were good tires. Based on two STS in my garage, they are like wet, mossy rocks.
    mckellyb and mckellyb like this.

  12. #27
    5applerush is offline Cadillac Owners Member
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    Re: 2007 STS Harsh ride, struts, air shocks

    Hi folks,
    Sorry to resurrect an old thread, but I agree with pjbizjak that the problem is something other than tires, shock/strut wear, or magnetic fluid leaks. I say this because I am experiencing the exact same thing with my 2008 (1SG) STS. I had to take mine to the collision shop after it was rear-ended a few months back. The car rode perfectly both before, and after the accident (before the repair). I just got the vehicle back and it rides worse than a stake truck; very harsh, and pounding over even small road imperfections. I strongly believe that something electronic is the cause of this sudden change of condition affecting multiple struts.

    pjbizjak, Did you ever get this resolved? I'm not sure where else to troubleshoot, and am hesitant to spend several thousand dollars without being sure that the issue is, in fact, premature strut failure.

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