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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 10-25-2013, 09:11 AM   #1
Rush12
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Join Date: Oct 2013
Location: Schaumburg
Posts: 10
My Ride: 05 BMW 325XI
05 BMW 325xi humming issue & vibration

Hi
I have 05 BMW 325xi All wheel drive! And when I hit acceleration it start humming from rear side! After 20 mph if I hit acceleration it start I think! Not sure And I just got new tires on it! But still humming ! Any idea?

Car has 158k miles on it!
And I just got done
Control arm with outer ball joint
Inner Ball joint
Tie rod
Control arm bushing set
I just got done all this thing
Day by day noise is getting worse so any idea what it could be?



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Old 10-26-2013, 09:21 AM   #2
Sgtbean
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Join Date: Nov 2012
Location: NY
Posts: 57
My Ride: 03 325xi
05 BMW 325xi humming issue & vibration

Could be a wheel bearing starting to go or a brake caliper hanging up.


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Old 10-27-2013, 09:26 PM   #3
Rush12
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Join Date: Oct 2013
Location: Schaumburg
Posts: 10
My Ride: 05 BMW 325XI
05 BMW 325xi humming issue & vibration

Caliper's good and I just got done wheel bearing but still humming and vibrates the car!
And when car's start going it vibrates and after 25 mph if I hit acceleration it start humming!




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Old 10-27-2013, 10:07 PM   #4
e46alfonso
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My Ride: 330xi, focus st
might be the transfer case. have you ever replaced the fluid? 158k miles is a lot on the original fill.
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Old 10-27-2013, 10:19 PM   #5
Rush12
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Join Date: Oct 2013
Location: Schaumburg
Posts: 10
My Ride: 05 BMW 325XI
05 BMW 325xi humming issue & vibration

You mean diff fluid?


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Old 10-28-2013, 10:26 AM   #6
SamDoe1
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Location: Minnesnowta
Posts: 3,503
My Ride: Clubs baby seals
Well that too but he's asking about transfer case fluid.
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Old 10-28-2013, 01:33 PM   #7
Rush12
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Join Date: Oct 2013
Location: Schaumburg
Posts: 10
My Ride: 05 BMW 325XI
05 BMW 325xi humming issue & vibration

Oh I think it's good!


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Old 11-05-2013, 12:06 AM   #8
Rush12
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Join Date: Oct 2013
Location: Schaumburg
Posts: 10
My Ride: 05 BMW 325XI
05 BMW 325xi humming issue & vibration

I just got done rear diff fluid change & center bearing! But still humming and vibrate's not gon!

Any idea? What it could be?


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Old 11-05-2013, 09:43 AM   #9
SamDoe1
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Quote:
Originally Posted by Rush12 View Post
I just got done rear diff fluid change & center bearing! But still humming and vibrate's not gon!

Any idea? What it could be?


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Did you change the center bearing or the transfer case fluid or both? They are not the same thing.
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Old 11-05-2013, 10:03 AM   #10
Rush12
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Join Date: Oct 2013
Location: Schaumburg
Posts: 10
My Ride: 05 BMW 325XI
05 BMW 325xi humming issue & vibration

I changed center bearing and rear diff fluid but transfer case fluid is good! And noise is like really bad! hold back thing vibrates and it start after 15 mph when i hit acceleration! If i let it go acceleration it's gon so i can't really tell what it is!


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Old 11-05-2013, 10:15 AM   #11
SamDoe1
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My Ride: Clubs baby seals
How do you know it's good?

Last edited by SamDoe1; 11-05-2013 at 10:15 AM.
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Old 11-05-2013, 10:25 AM   #12
Rush12
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Join Date: Oct 2013
Location: Schaumburg
Posts: 10
My Ride: 05 BMW 325XI
05 BMW 325xi humming issue & vibration

Like just got done before 2 months!


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