The low speed vibratory rattle I had on mine (as well as a squeaking noise when turning s/wheel) was the bushing on the steering rack where the s/column attaches.
BMW fitted a new rack, as the bushing is integral with the rack, so not cheap if the car is out of warranty.
2017 X5 4.0dSE ~ Atlas Cedar:Amaro Brown Merino, Piano Blk, Sport Auto, DHP, Comfort seats, Cold weather pack, HK audio, Electric towbar, Sun protection glass
SOLD - 2011 135i M-Sport Coupe DCT ~ The only Bluewater:Coral Red E82 135i in the UK.
1932 Ford 3 window Coupe hot rod