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|5-Series (E12,E28, E34, E39, E60) Chat relating to the BMW 5-Series of all generations. Specific models include: BMW 518, BMW 520, BMW 520i, BMW 530i, BMW 528i, BMW 530i, BMW 518i, BMW 524d, BMW 525i, BMW 525e, BMW 528e, BMW 540i, BMW 535i, BMW 520d, BMW 525td, BMW 525d, BMW 530d, BMW 525i/xi, BMW 530i/xi. (BMW 5-Series Forum)|
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Thrust arms. Bushings. Bad hub bearings. Warped rotors. Busted tie rods.
and have the tire balanced on a "road force" machine. it simulates the pressure applied during driving conditions at various speeds.
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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