Vibration at 45-60 Mph in 2000 540 - BMW Forum - BimmerWerkz.com
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#1 (permalink) Old 04-08-2008, 11:00 PM
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Vibration at 45-60 Mph in 2000 540

Hello to all the experts on this wonderful site!

I purchased very recently a 2000 540 that has some odd vibration at certain speed (45-60 Mph), mostly noticable when the car is cold (first 5 mins of driving). It feel it in the wheel and sometimes even on the seat (on the whole body). It is definitely stronger in the first 4-5 mins and after that it is pretty much gone...

I did buy new tires for it, had them balanced a couple of times (by the local Firestone and then by the BMW dealer), then aligned but that did not really help much for the vibration.

The BMW dealer are blaming the tires but the problem was there before those new tires, so I am not sure I buy that story. They were lazy enough to put a set of 4 wheels from another BMW on the lot (just gave me bunch of exuceses - did not have the exact 540...).

I read that this was a 'common' problem. Is that really the case and what might be some fixes for it?

Thank you in advance!
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#2 (permalink) Old 04-08-2008, 11:08 PM
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Thrust arms. Bushings. Bad hub bearings. Warped rotors. Busted tie rods.



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#3 (permalink) Old 04-08-2008, 11:28 PM
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Originally Posted by Teh Prof View Post
Thrust arms. Bushings. Bad hub bearings. Warped rotors. Busted tie rods.
+1

and have the tire balanced on a "road force" machine. it simulates the pressure applied during driving conditions at various speeds.

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#4 (permalink) Old 04-08-2008, 11:40 PM
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Thrust arms. Bushings. Bad hub bearings. Warped rotors. Busted tie rods.
I have new rotors and tie rods seem fine. The dealer mentioned potentially bushings but they even said they were not that bad...Wouldn't the rest be somewhat easy to catch (it is the BMW dealer!!!).

Why would it make it when the car (or tires) are colder? If it is not tires, then it seems like it is most likely the busings, right? I assume some vibration of the engine / tranny while still warming up and this causing the vibration. On the other end, I can feel it in the steering wheel more heavily...

Should I go back to the shop that sold me the tires and insist they put a new front pair to make sure it is not defect in the tires? The whole 'does it before being warmed up' throws me off....

Thanks again for the thoughts!
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#5 (permalink) Old 04-08-2008, 11:44 PM
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+1

and have the tire balanced on a "road force" machine. it simulates the pressure applied during driving conditions at various speeds.
Got them balanced on 'road force' - dealer indicated they balanced them 'right' yet they say they are '90% sure it is defect in tires' - this confuses me, I must admit - how could they balanced them 'correctly' and keep blaming the tires? If they were defect, wouldn't they not be able to balance correctly?

Honestly, so far I am very disappinted with the BMW service. At $130 an hour and the big silver BMW sign, they ought to do better than that...
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#6 (permalink) Old 04-09-2008, 12:18 AM
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Thrust arms go out all the time and cause these symptoms. And some dealers are better than others. Have a good independent mechanic nearby?



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#7 (permalink) Old 04-09-2008, 09:54 AM
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Could be any of what the guys already suggested above. Do you feel the vibration during braking as well?

Did you also check the driveshaft joints?

The other thing is, how long do you let the car sit in between your cold starts?
Hi performance tires are softer compounds, and if left to sit for long, will cause flat spots on the tires.
They do take a few mins, as you described, to warm up and get back in shape.
I've had that problem before with the 540i, but only if it's been sitting for a few days.
I have that problem with my C4S all the time now as well.

Or...could be a bad tire, doesn't mean if they are well balanced, the tires are not faulty.
I had a 626 once that had a bad vibration (whole car) and couldn't seem to find the fault. Everybody diagnosed it as bad tires but I was skeptical as they were still pretty good. Eventually I replaced the tires and the problem was gone.

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Last edited by CosmosBlack; 04-09-2008 at 10:00 AM.
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#8 (permalink) Old 04-09-2008, 09:42 PM
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Originally Posted by CosmosBlack View Post
Could be any of what the guys already suggested above. Do you feel the vibration during braking as well?

Did you also check the driveshaft joints?

The other thing is, how long do you let the car sit in between your cold starts?
Hi performance tires are softer compounds, and if left to sit for long, will cause flat spots on the tires.
They do take a few mins, as you described, to warm up and get back in shape.
I've had that problem before with the 540i, but only if it's been sitting for a few days.
I have that problem with my C4S all the time now as well.

Or...could be a bad tire, doesn't mean if they are well balanced, the tires are not faulty.
I had a 626 once that had a bad vibration (whole car) and couldn't seem to find the fault. Everybody diagnosed it as bad tires but I was skeptical as they were still pretty good. Eventually I replaced the tires and the problem was gone.
Driveshaft was checked out - did not seem that to be the case. It does it even it sits overnight. It might be little worse when it sits throughout the weekend...Definitely feels it more in the colder days. I guess it could be tires but I was feeling the same vibration with the old set of tires, which does not help explaining it...

I will bring in the car at the tire place that sold me the tires and maybe they will figure it out if it is the tires...If it is not, I hope to find a decent independent mechanic who can figure it it. The BWM dealership seem to be 'striking out' as they put it...
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