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Suspension & Braking
Have some questions about suspension or brake setups for your E46 BMW? Get all your answers here!

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Old 04-13-2013, 11:14 AM   #1
amnesiak
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Join Date: Apr 2011
Location: Seattle, WA
Posts: 22
My Ride: 2001 325i
Should I upgrade sway bars (subframe)?

Hi everyone,
I have a 2001 325i with 185k on it that I've owned since new. I've recently started to do all the work on it myself, and it's time for a complete suspension overhaul.

One thing I wasn't aware of on my car until recently is the propensity for subframe cracks. I didn't notice anything when I was changing my diff oil (apart from a destroyed diff bushing), but I'll do a more thorough inspection during my suspension overhaul.

I was planning on upgrading sway bars during my suspension overhaul but I don't want to put undue stress on the subframe and cause it to fail. I'm trying to save up for an F80 M3.

Any opinions or advice would be appreciated.

Thanks!

Edit: I also want to note that even though I've been the only owner of this car and didn't move for years during the time of the lawsuit, I never received a letter about it. Advice?

Last edited by amnesiak; 04-13-2013 at 11:24 AM. Reason: edit: about lawsuit
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Old 04-15-2013, 11:43 AM   #2
amnesiak
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Join Date: Apr 2011
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My Ride: 2001 325i
Bump for a lack of opinions?!?
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Old 04-15-2013, 11:52 AM   #3
KrasivataSabine
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Join Date: Dec 2011
Location: Del Puerto Canyon Drive, CA
Posts: 673
My Ride: 323Ci
Are you talking about the propensity of (1) the unibody to tear as a result from the torque/fatigue of the diff carrier (aka subframe), or (2) the possible crack/fatigue of the swaybar-to-unibody mounting brackets.

(1) - The sway bar should put no undue stress on the unibody where it is known to tear. Again, it is the torque of the differential which fatigues the unibody. Get a second opinion, but I am pretty sure.

(2) - You can get sway bar mount bracket reinforcements. They come with the hotchkis sway kit, idk about others.

Good luck with the F80!
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Old 04-15-2013, 11:55 AM   #4
amnesiak
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Join Date: Apr 2011
Location: Seattle, WA
Posts: 22
My Ride: 2001 325i
(1) is what I was talking about. Sounds like (2) is a good idea. I was planning on the turner bars.

Thanks for the reply and the well-wishes, I'm kind of stoked that the next m3 will come in 4 doors and have an i6.
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