2007 BMW 550i - rattle vibration floorboard

2007 550i 66,500 miles. When driving at any speed over any average road that has bumps or imperfections, there is a troubling distinct vibration and rattle under the passenger's feet - the floor board. All 4 wheels balanced and aligned. Wheels checked and true. plastic undercover taken off by Firestone and they had no idea whatsoever. The rattle/vibration can be felt slightly on drivers side - but it is far les in intensity as it is simply travelling from passenger side. Anyone have any experience with passenger floorboard rattle/vibration? I only want a service guy who has sen and diagnosed this before. I don't want to py for someone to make educated guesses on my dime.
Brian
bpastor at AtlantaLawyer dot com

Originally Posted by pastb

2007 550i 66,500 miles. When driving at any speed over any average road that has bumps or imperfections, there is a troubling distinct vibration and rattle under the passenger's feet - the floor board. All 4 wheels balanced and aligned. Wheels checked and true. plastic undercover taken off by Firestone and they had no idea whatsoever. The rattle/vibration can be felt slightly on drivers side - but it is far les in intensity as it is simply travelling from passenger side. Anyone have any experience with passenger floorboard rattle/vibration? I only want a service guy who has sen and diagnosed this before. I don't want to py for someone to make educated guesses on my dime.
Brian
bpastor at AtlantaLawyer dot com

Try the Seven Series board; better venue for this problem.

Had a similar issue on an E39 M5, different platform BUT all the local tire shops indicated my tires were fine, and my rims were fine - until I went to a specialist who found one tire significantly out of balance (returned to tire rack) , one rim with a high spot, and another rim slightly out of balance - took them 1hour of focus with a Hunter machine - and fixed 90% of my issue the remaining 10% was control arm bushings (this was at 70,000 miles on my car).