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Old 02-27-2016, 11:12 PM   #1
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Join Date: Sep 2014
Location: San Diego
Posts: 7
My Ride: 2004 325Ci
Help! Metal-on-Metal "Thumping."

So I got this issue going on:
I get a strange and somewhat loud metal on metal thumping sound coming from the rear of my 5 speed 325Ci.
It started when I was on my way home from the gym and I went over a railroad crossing; nothing was in my way on the road and it wasn't a big "bump" like some of the railroad crossings.
Almost immediately after going over, my car started shaking and I thought that I had a flat tire. I pull over and as I was applying the e-brake, I realize that it's a lot stiffer than the usual, then I proceed to check all tires and wheel nuts, and they are all fine.
I try to "wiggle" things around to see if something is loose, but could find nothing.
I go and try to move my car, as I was about a block away from home, and hear that metal on metal thumping sound, which only "sped-up" as I sped-up and vice versa. It happens whether I'm in neutral and push the car, or in gear and move the car.
Any ideas on what the cause might be?
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Old 02-28-2016, 12:14 AM   #2
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Join Date: Nov 2015
Location: Chicago
Posts: 736
My Ride: 330ci
Take apart the rear rotor and inspect the brake shoes possibly.

Rear different bushing

Check rear springs, they could have broken
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Old 02-28-2016, 12:48 AM   #3
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Join Date: Aug 2009
Location: gross deutsches reich USA
Posts: 963
My Ride: 323i with S54
Got to lift the car and inspect the rear end. These cars also have subframe cracking issue.
Siemens MS43 tuning master
HakenTT is offline   Reply With Quote

325ci, e brake, rear axle, thumping noise, weird noise

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