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      11-26-2021, 09:34 PM   #1
blacklisted.m3
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Rear Subframe Bushings

On the verge of trying to sell my car but it sounds like my subframe bushings are starting to go out. Want to replace them before any buyers take interest. Any recommendations on which ones i should go with? Mainly street driven running supercharger
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      11-27-2021, 12:04 PM   #2
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Consensus is solid. That's what I'm getting ready to do. As for what brand id just do whatever the shop prefers to install.
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      11-28-2021, 07:08 AM   #3
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If you’re selling your car and dont want to spend too much do the akg poly bushings. You can swap them without removing subframe which is how i did it.
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      12-16-2021, 09:47 PM   #4
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How many miles on your car and what makes you think they're going out?

Last edited by wyatth; 12-16-2021 at 10:07 PM..
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      12-17-2021, 12:58 PM   #5
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Also curious what makes you suspect your subframe bushings are failing?

My car is also supercharged and mainly street driven with a handful of track days sprinkled in.

I also thought my OEM bushings were toast, but they weren't.

Turned out that my OEM subframe bushings were in very good condition, I changed them out to solid one piece aluminum, to make the track experience less stressful.
The rear of the car twitched in certain track scenarios with the rubber bushings and just felt super creepy.

However, the back of the car also did a lateral twitch at each gear change even when just doing a straight line pull.

The solids did cure the lateral twitch feeling.
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      12-19-2021, 11:31 AM   #6
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Quote:
Originally Posted by wyatth View Post
How many miles on your car and what makes you think they're going out?
hearings a clunking noise in the rear and around 81300 rn
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      12-19-2021, 12:02 PM   #7
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Quote:
Originally Posted by blacklisted.m3 View Post
Quote:
Originally Posted by wyatth View Post
How many miles on your car and what makes you think they're going out?
hearings a clunking noise in the rear and around 81300 rn
Could be a broke rear diff bolt
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      12-19-2021, 07:28 PM   #8
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Quote:
Originally Posted by blacklisted.m3 View Post
hearings a clunking noise in the rear and around 81300 rn
Highly likely it's not the rear subframe bushes. Might be diff bolt or broken exhaust hanger.
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      12-22-2021, 04:48 PM   #9
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Quote:
Originally Posted by aututto View Post
Could be a broke rear diff bolt
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Originally Posted by Redd View Post
Highly likely it's not the rear subframe bushes. Might be diff bolt or broken exhaust hanger.
so the clunking noise only comes up when i go over a bump or any cracks on the road, other times its like a perfect car again
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      12-22-2021, 04:50 PM   #10
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the exhaust hangers are fine, originially when i started to look for the problem i thought it was the shock absorber but it wasnt it. then i swapped my entire suspension out eventually and it never went away. changed some bushings on the swaybar never fixed either.
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      12-22-2021, 05:43 PM   #11
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Quote:
Originally Posted by blacklisted.m3 View Post
the exhaust hangers are fine, originially when i started to look for the problem i thought it was the shock absorber but it wasnt it. then i swapped my entire suspension out eventually and it never went away. changed some bushings on the swaybar never fixed either.
How were your upper shock mounts? Also I had a pretty persistent clunk from my lower shock mounts not being properly seated in the camber arm. There is a milled pocket for them to sit in and the driver side was ever so slightly crooked. I reseated it and it went away entirely. There should be no resistance putting the bolt through the camber arm and lower mount bushing.
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      12-30-2021, 11:00 PM   #12
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I have a clunk as well, in both front and rear, and only over bumps (when going very slow, no clunk).

I'm leaning towards the shocks as well since car has been previously lowered w/ springs.

Anyone able to chime in about anything similar?
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      12-30-2021, 11:37 PM   #13
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Quote:
Originally Posted by ksc View Post
I have a clunk as well, in both front and rear, and only over bumps (when going very slow, no clunk).

I'm leaning towards the shocks as well since car has been previously lowered w/ springs.

Anyone able to chime in about anything similar?
My BMW tech friends both told me to start with the sway bar endlinks as those can make all sorts of noise if loose or the joints have too much play.
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      01-06-2022, 07:25 PM   #14
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That's definitely something i considered too. I'll check that out first and report back!
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      01-08-2022, 02:09 PM   #15
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Curious why AKG states that "Remember: the material used for the diff mount bushing location(s) must match the material used for the subframe bushings."

Is it really a must?
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      01-10-2022, 11:49 PM   #16
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Plenty people upgrade diff bushings and leave subframe bushings stock and are happy with it I think you should be fine
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      01-11-2022, 08:32 PM   #17
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Quote:
Originally Posted by North.E92 View Post
Plenty people upgrade diff bushings and leave subframe bushings stock and are happy with it I think you should be fine
I see a lot the other way around.

Lots did subframe bushings and no diff bushings because of the whine.
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      01-11-2022, 09:13 PM   #18
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Quote:
Originally Posted by MisterClutch888 View Post
I see a lot the other way around.

Lots did subframe bushings and no diff bushings because of the whine.
I just did AKG poly subframe bushings and ECS Diff bushings and I get zero whine
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      01-12-2022, 12:09 AM   #19
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Quote:
Originally Posted by Throatpunch View Post
I just did AKG poly subframe bushings and ECS Diff bushings and I get zero whine
6MT or DCT? DCT more prone to whine.
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      01-12-2022, 01:10 AM   #20
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Quote:
Originally Posted by Redd View Post
6MT or DCT? DCT more prone to whine.
6MT
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