[andreu12qw]

Join me in my journey to find a rouge rattler coming from the rear half of the car.

Car set-up:
2011 E90 335i
Fortune-Auto 500 series coilovers (recently refreshed)
Spherical bearings replaced for the trailing arms
M3 rear control arms
Bimmerworld adjustable toearms
solid aluminum subframe bushings
Condor Speed shop UHMW diff bushings
powerflex poly inner spring arm bushings
Napa special solid rubber upper shock mount
Turner MS lower spherical shock mount

The rear end is solid and there is some additional NVH but there is a rattle back there that sounds like a warped 1x6 board bouncing around an empty truck bed, when going over rough roads at slower speeds.

I have torqued and marked just about every control arm bolt, drive shaft bolt, exhaust mount, heat shield nut, etc. I checked the rear coilovers as I originally suspected a blown shock (hit a huge pothole a year ago and notice it start to sweat fluid) so I preventatively replaced both rear shocks.

I am putting this out there in case anyone has experienced anything else coming loose. I recently saw that FCP-Euro is selling an aluminum bracket for the rear parking brake as the plastic mount can fail and cause some noise, which is what got me thinking about posting this.