I have a 99 740iL where the drivers seat constantly makes a popping noise as i shift my weight into turns. This problem arose during the warranty period but they (dealer) always came up with a fix that never fixed the problem. I have a buddy with a 2000 model that does the same thing. I have to believe BMW knows of this problem but hides it until the warranty expires. Has anyone experienced this or know of a maintenence bulletin put out on it. Or, does anyone know how to fix this problem.