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General E46 Forum
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Old 03-22-2015, 08:53 PM   #21
OneTonSoup
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Join Date: Mar 2015
Location: Virginia
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My Ride: 330xi F350 MX-5 MDX
So, I'm resurrecting this old thread because I have found the cause of my particular thumping-sound-who's-frequency-is-proportional-to-speed-and-not-affected-by-rpm. It was coming from the rear speakers. After disconnecting them, the sound quit. I'm wondering if there's an active noise-reduction system (which, I hypothesize, would engage more as speed increases) which has gone loco. Or, maybe just some dirty connections. I'm going to pull and clean all the audio system connectors, next chance I get.
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Old 03-23-2015, 01:26 AM   #22
glhx
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Join Date: Jan 2012
Location: Nashville, Tennessee
Posts: 2,107
My Ride: 2002 330ci
My thoughts on this

I had the same issue.
My guibo was bad......not noticeable by looking at it. Had to take it out.....cracked all to hell
My csb was bad.....caused lots of vibration like you say. It's not the bearing....it's the thin rubber housing it sits in.
My transmission mounts and engine mounts were also bad....transmission mounts busted in half.

What happens when you put up with it and wait to fix it. Your $700 drive shaft goes bad. The cv axle at the end binds up. The non replaceable U joints loosen and make your driveshaft useless. Which costs a lot more than a guibo and a csb....and all 4 mounts. A stethoscope won't do anything,......take down the exhaust and remove the cover. Then inspect it.

Mine was done at 115k. Yours probably is as well. You know the result
Your shocks are probably shot too
And Rtabs.....and fcabs
This stuff is preventative maintenance. It just goes bad between 100k and 150k

The wheel bearings will give you a humming noise. They usually go to 150k
No special tools HAVE to be used. Plumbing parts and rentals work OK. Eds garage on you tube had the best of the best diy on this. Taking it apart and re installing them. One video is using $200 in harbor freight tools and the other is doing it the Home Depot route. Do not buy cheap bearings.

Why pelican.....of the parts houses we use they are the most expensive for the same parts.
Www.getbmwparts.com is always the cheapest I've found. But really, use furiousmethod.com or look at silbervogel . His app is really good.

If your belts are cracked. Replace them and get dayco pulleys. Your pulleys are probably shot and have no grease left. You will know when you take the belts off.

All in all. Look at my sig for new owners. If your new here you will save a lot of time and money by going there first.

Just replace all this stuff. It's probanly all shot
I'm afraid you will have to throw money at it. But keep in mind.....when you inspect these parts. You will realize that they are causing your problem and throwing your U joints out of alignment.
My car drove me nuts like this for a while. And still does......my rear wheel bearing is going out. And predictably when it's supposed to.

Last edited by glhx; 03-23-2015 at 01:44 AM.
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Old 03-23-2015, 01:28 AM   #23
glhx
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Join Date: Jan 2012
Location: Nashville, Tennessee
Posts: 2,107
My Ride: 2002 330ci
The stereo bumping sound is common as well. I think I took mine apart and re flowed solder joints. Or just. Ought a used one and it went away. I want to sY it's the built in amp causing that. ReAlly annoying.....but doesn't sound like a wheel bearing problem.

A LOT of stuff has gone bad on my car. And I'm at 135k

Listen to dmax.....he's not a mechanic.....yeah right.
Dmax.....your more e46 mechanic than 99% of people on here. And really patient
What we really need. A thread showing all these parts and their mileages. It's one thing to say the guibo is bad.....another to show all these parts in their damaged state. I still have most of them in a very deep box

Last edited by glhx; 03-23-2015 at 01:53 AM.
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Old 03-30-2015, 08:31 PM   #24
Just A Wagon
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Join Date: Sep 2013
Location: Ridgefield
Posts: 346
My Ride: 2001 330I TOURING
Did the OP ever fix his problem?
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