[DarenF]

I had exactly the same issue on my F10 520d MSport from when I bought it a year ago.

I changed tyres, all the brakes, suspected buckled wheel so I bought refurbed wheels but nothing solved it.

Then, last week, the lower coil snapped on the rear spring. I had them changed for BMW original parts at my local indi for £375 including the springs and the wobble has dissappeared.

The car drives sublime again. Rear has firmed up too.

The road force thing is junk, don't waste your money.

I've been searching for a solution to this issue for a year now and hundreds of people seem to be having this issue please spread this solution.