For the past couple of weeks i've noticed some creaking coming from somewhere between the bottom of the passenger-side b-pillar to the rear wheel area. It's hard to pinpoint, but it's on that side for sure.

It only happens when:
- Shortly after taking off from a stop
- Coming to a complete stop
- At certain times of the day
- Turning onto driveways/parking lots at an odd angle
- After sitting overnight, shifting from P to R (just right after)

It does not happen when:
- Turning/steering by itself, either stopped or regular turning from street to street
- Hitting speedbumps
- At cruising speed
- Pushing the car up/down at a stop (thinking it could be the dampers)

I have at least confirmed it's not the brakes.

My initial thoughts:
- The bolts on the siderails that attach the 6pt brace to the car. There is no play, however, when i forcefully tug on it
- Sway bar bushing need relubing? The fronts are Eibach's w/ newly greased bushings, the rears are still OEM w/ almost 70k on them
- Bad endlinks? How can i tell if they are?

The creak sounds very much like those in this video (i know it's not a G35, but the creak is the same)

Fast foward to these sections:
0:42, 0:59

Thank you!

 

Thought i'd just update this post in case anyone else runs across the same issue.

I think i fixed it *knock on wood*.

Checked all four end links and they seem okay, i put lube on them anyway. Didn't seem to do anything.

Then i lubed the rear sway bar bushings, there was nothing on there except very little brittle white stuff (probably lithium from factory?). I think this did something as i couldn't hear the noise from the rear, i still had those on the side.

Lastly i took off the 6pt brace, leaving the mid-brace intact. Voila. So far the creak is gone. I've inspected the bars themselves and they all seem fine, it was also on the car fairly tight. I'm thinking the culprit is the threaded insert on the passenger side... my only guess is it probably got stressed/fatigued from the HPDE. If i can figure out how to remove it, i may replace it someday. For now, the brace will be off for a while.

On the upside, the car is a bit more comfortable now, although handling also feels sloppier.

 

I don't have this problem, but am interested to see if this fixed your problem.