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E46 Xi Forum
The E46 XI was produced from 01-05 in sedan and touring body styles. Powered by either a 2.5L inline 6 in the 325xi or a 3.0L inline 6 330xi. Discuss all thing about BMW AWD E46 'Xi' here.

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Old 01-23-2020, 06:39 PM   #1
Alpinerunner
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Join Date: Aug 2006
Location: Stamford, CT
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My Ride: 1990 M3
65mph+ vibration/drone

I have a 193k miles 325xi wagon that has a vibration but it's more of a drone that starts around 60-65mph... I hear it more than I feel it. The front axles were replaced at 133k miles and I just replaced the driveshaft. What is the next most likely culprit? Do rear axles go bad? Could the front CV joints have failed in 60k miles (boots have not failed). I realize it could be the tires, but they are pretty new and have full tread. TIA
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Old 01-23-2020, 07:19 PM   #2
GreaseJunkie
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My Ride: 325xi
Have you replaced the bearings?

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Old 01-24-2020, 08:04 AM   #3
chrisr03325xit
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My Ride: 2003 325 xit
Year: 2003
Model: 325xit
Transmission: GM
For me it's always been bent wheels which I've had easily repaired several times.
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Old 01-24-2020, 08:43 AM   #4
77'911
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When's the last time the diffs and transfer case had their fluids serviced(IE for drone)? Wheel bearings can be an issue. Does the drone go away when your in a corner, or is it constant? A few things that got rid of vibrations in our car was the following:
1) new motor mounts (transfer case mount is next)
2) fresh NGK plugs and new Bosch coils to replace the horrid Bremi units
3) servicing the trans (BMW factory service kit and fluid-2x).
4) replaced all the exhaust hangers
5) installed new upper ball joints, lower control arms and bushings(all factory bmw, really improved it on the hwy)
You might get the car up in the air and give it a once over. At 193k, it could be any number of factors. Hope you get it solved. These cars are fantastic when they get serviced.
regards
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Old 01-25-2020, 12:41 PM   #5
Alpinerunner
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Quote:
Originally Posted by GreaseJunkie View Post
Have you replaced the bearings?

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Do you mean CSB? The rebuilt driveshaft came with a new CSB. I'm really hoping it wasn't a poorly balanced driveshaft but that's kind of what it feels like. What's strange is it comes on pretty quickly between 60-65 and stays constant as speeds increase (don't seem to get worse up to 80).

Quote:
Originally Posted by chrisr03325xit View Post
For me it's always been bent wheels which I've had easily repaired several times.
Just swapped wheels with a set of M contour I had lying around last night. No change.

Quote:
Originally Posted by 77'911 View Post
When's the last time the diffs and transfer case had their fluids serviced(IE for drone)? Wheel bearings can be an issue. Does the drone go away when your in a corner, or is it constant? A few things that got rid of vibrations in our car was the following:
1) new motor mounts (transfer case mount is next)
2) fresh NGK plugs and new Bosch coils to replace the horrid Bremi units
3) servicing the trans (BMW factory service kit and fluid-2x).
4) replaced all the exhaust hangers
5) installed new upper ball joints, lower control arms and bushings(all factory bmw, really improved it on the hwy)
You might get the car up in the air and give it a once over. At 193k, it could be any number of factors. Hope you get it solved. These cars are fantastic when they get serviced.
regards
Replaced motor mounts but not TC mount. New fluids all around including trans, replaced center exhaust mounts when I did driveshaft. Didn't think of wheel bearing, that is possible. I'll have to throw it around at highway speeds to see.
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