I'm trying to track down nagging dynamic seat function problems. I was looking at parts on Ebay today, and noticed the link I'll post below, of a driver seat bottom bladder with both bladders all along the bottom of the seat, and side bolsters. I've never had the bottom bladders working on my seat (if there), and didn't even know that was a part of the seat. Have I just missed this all along, and should be having seat massage function on the bottom cushion, along with the side bolsters going around corners? This seems like a dumb question, but the Ebay ad is making me wonder...

https://www.ebay.com/itm/12397552169...Bk9SR_ah6KeHYQ

 

The bottom is not affected by the dynamic seating function. Only the side bolsters.
There is a bladder, but only to make adjustments.
Massaging only works on the back (at least to my knowledge). Mine work fine but just the seat back massages.
Hope it helps.