You might need to learn how to use the lumbar adjustment properly, and I'm not trying to sound condescending. I used to get LBP from my seats until I learned how to use that air bladder properly.
Past: '08 E92 335i|JB|wheels|"eater of HPFPs"
Present:'15 Mustang GT|401A|PP|Recaros|6MT
Sig pic unrelated. I like to go sideways and stuff.