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BMW 3-Series (E90 E92) Forum
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Passenger seat shakes
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01-15-2012, 09:35 PM | #1 |
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Passenger seat shakes
Hey guys so I have a May '06 build 330xi with about 74k miles on it. My passenger seat shakes when I drive around. It's most noticeable at highway speeds, but it happens at low speeds as well. More specifically, I see the headrest shaking.
My alignment is fine. Wheels are in balance. The only thing I have not checked is the suspension. Bushings are my first guess. I'll be replacing the shocks and springs this Spring with a set of bilsteins and eibach lowering springs. But how can I check for worn bushings? Also any other possible causes? I had some work done to the rear subframe, which was rewelding the passenger side trailing arm mount. But I can't remember if I had this issue before or after. I don't get any shake in the steering wheel. But when I have a cup full of liquid in the cup holders, they shake like crazy. |
01-15-2012, 09:54 PM | #3 |
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01-15-2012, 10:02 PM | #5 |
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01-16-2012, 01:07 AM | #6 | |
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Drives: 330i, 135i
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I also have this issue now. I remember that when i replaced my front tires this issue went away. How are old are your front tires? I know i need new ones. Hopefully thats it. Let ke know if you find a solution. Thanks |
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01-16-2012, 02:21 AM | #7 |
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If its not a wheel out of balance, its the run flats, dump those terrible riding shitty things and get a smooth ride with a regular tire.
but with 74K, could be suspension related.. |
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01-16-2012, 01:18 PM | #11 |
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I had a strange vibration on the passenger side of my car as well, ended up being a transmission mount bushing. Have a read at my experience, may or may not be relevant...
http://www.e90post.com/forums/showthread.php?t=434049 Last edited by 2kaccordocoupe; 01-16-2012 at 01:27 PM.. |
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01-16-2012, 01:23 PM | #12 | ||||
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Will let you guys know if I find any solutions Quote:
I just swapped to my winter setup and they did not have bubbles. Nor did my summers. Quote:
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Thanks for the responses guys. Much appreciated. I'm glad I'm not the only one with this issue. I'm convinced it's a suspension issue though. I don't think it's the shocks/springs but that will be eliminated this Spring when I swap them out. I'm leaning heavily towards bushings. But I have no idea on how to test them. |
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01-16-2012, 01:31 PM | #13 | |
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01-17-2012, 01:49 AM | #14 |
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Yes i will keep u posted as well. I will buy new tires soon. If anyone found tye solution to this issue please advice us on what to so. Thx
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01-19-2012, 01:57 AM | #16 |
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01-19-2012, 07:03 AM | #17 |
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Even if your wheels/tires balance, you could have some sort of issue with your wheels/tires that would cause vibrations.
Check your wheels to make sure they are 100% true. Any bend, even after balancing, can excite frequencies. I had a set of wheels I bought used, and would always have a vibration when going over 80 (shh.....). Wheels/tires were rebalanced 3 times (each time was given the ok). Finally, I saw the wheel while it was on the hunter - the inner barrel had a very slight bend. Got them fixed, and car is smooth all the way up the speed range. One test would be to swap wheels/tires with someone who does not have the problem, and see if you notice the vibrations. I do have to say that the passenger seats in these cars are VERY sensitive to vibration. You'll see it before you feel it. |
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01-19-2012, 12:16 PM | #18 | |
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01-19-2012, 02:01 PM | #19 |
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My car has always done that since I bought it. Even with brand new tires after a mount / balance. I always just figured it was the nature of the car with sport suspension, considering roads aren't ever perfectly smooth.
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01-19-2012, 02:03 PM | #20 |
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Ever since I got the BMW performance suspension and stage 2 ppk installed, I get a rattle from the passenger side when I go over roughish roads. Wondering if it's just because I need someone sitting in the passenger seat to offset my 245 pound physique...
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01-19-2012, 05:35 PM | #21 | |
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