Vibration while driving

[wulley1]

I just bought a 98 328iS on friday and notice a vibration while driving home. It's noticable around 30mph and up and starts to really be noticable around 65. It feels like it's coming from below the front seats. At first I thought it just need an alignment, but now I'm not sure. Any ideas?

[camnipotent]

I would go get your tires rotated and balanced. This happens a lot and by fixing your balance, it usually solves the problem. It seems even more obvious that the vibration gets worse at high speeds. Also, an alignment wouldn't hurt at all after you get the rotatation and balance completed. My money is on the balance. Also, check the tread on your tires. From an angle compare the height of each piece of tread. If some tread is higher than other parts, your tires are cupped and need replacing. I had this same problem with the rythmic vibration and a new set of tires, balanced, solved the problem quickly.

[CiscoKid]

same... im getting mine balanced tomorrow because of the saem problem... one of the wheels threw a weight

[skawful]

another more expensive problem could be tranny mounts !

[Furious]

does it happen during harder acceleration? it could be your guibo disk, to check take the car out and in second gear punch the gas and if you feel vibrations on acceleration , there is a good possibility that it could be your guibo disk, but dont rule out tranny mounts like skawful said. lastly the and the most obvious solution could be a wheel alignment or possibly one tire has a possible defect.

[leobmw]

whats the guibo disk?

[BeemerMan]

It might be that dildo you dropped, turn it off. :nana

[camnipotent]

It's the rubber disk between the transmission and drive shaft. It acts as a damper when shifting and engaging gears. It makes the transfer of power to the driveshaft smooth, not harsh.

[wulley1]

The vibration is always constant, it doesn't matter if I'm accelerating, costing, or braking. It's really not that harsh of a vibration, it's just enough to be noticable. I setup an appointment to have the tires spin balanced and the alignment checked.

[camnipotent]

That's a safe bet. Let us know how it turns out.

[CiscoKid]

it could also be the control arm bushing too... i just got my tires balanced, and there is no vibration anymore

[wulley1]

I was just ouside looking at my tires and I noticed that the driverside front tire is old with not much tread left, and it looks like the wear was un-even. All the other tires seem like they are brand new and there are no signs of un-even wear. I think it needs to have that front tire replaced and an alignment.

ghead

[camnipotent]

It would be a good idea to get both front tires replaced. Better yet, get 2 new back tires and put the current rear tires up front. You don't want to continue wearing your tires unevenly.