E93 Rear Ride Height Uneven out of spec

[cwise]

I have a 2012 328i convertible that I recently bought privately, so dont know much history, but there is no evidence of prior body or suspension damage. The right rear is 1 inch lower than the left rear as measured from the bottom of the wheel to the center of the wheel arch. According to the manual it looks like the height should be 22.83 inches, I get about 22.75 on the left (driver) side and 21.75 on the right side. According to the manual there should be no more than 10mm from the spec between all 4 wheels. The front sides are both the same and in spec. I have read a lot about uneven ride height between driver and passenger sides, but no real answers. I swapped the springs, along with the rubber parts on the top and bottom from one side to the other and almost unbelievably, there was no change in the ride height on either side. I used a spring compressor, so didn't have the suspension apart, and when the car was in the air, supported by jack stands on the two rear jack points, the distance between the center of the wheel and the garage floor was the same on both sides. Has anyone else seen this?

[R.Thomas]

A photograph showing the height on both sides would helpful.