3-Series (E21, E30)Chat relating to the BMW 3-Series from 1975-1983 and 1984-1991 line. Specific models: BMW 315, BMW 316, BMW 318, BMW 318i, BMW 320/4, BMW 320i, BMW 320/6, BMW 323i, BMW 320i. E30 Family models include: BMW 325e, BMW 325i, BMW 325is, BMW 325ix.
I have a question in regards to a vibration that seems to be coming on around 75MPH and increases with an increase in speed. I woul like to know if any of you have experiened this and what component might be suspect in causing this. I.e. Wheel balance, wheel bearing, driveshaft imbalance, bushings. Any sugestions would be appreciated. Thankyou all in advance for your help once again
Increasing vibration with increasing speed can be hard to diagnose. Because it can be an unbalanced tire, worn tie rods, worn or blown struts, warped/bent rim.
but some questions to help diagnose would be.
do you have aftermarket wheels?
Did you recently get a tire replaced?
any suspension work recently? if no when was last time it was serviced?
hit a really bad pothole recently?
can you push down on the car with your hands at does the car spring back up and stop? or does it keep bouncing a little?
I just recently got the car. I did notice a vibration in the front end when I first got the car a couple weeks back. I checked tire pressure and rotated the tires. The vibration decreased quite a bit. Now seen to be coming more from the rear and with increasing speed as previously stated. I'm tending to lean toward a tire imbalance issue. However I am new to BMWs. What do you think?
i had the same problem with my 87 320i, check all the bushings for the front suspension when you can get it up on a lift, they should not be cracked, and if the are, replace them, its really easy job to do
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