A few months ago, I had a creaking drivers seat. I found the source was the front pivot points on the forward portion of the seat....there were some white nylon bushings that once given a shot of lube, became silent.
But a week ago, an even worse "creak" or cracking noise appeared whenever I got in or out of the car...very annoying. A careful examination showed some cracking of the left side plastic trim, that surrounds the various seat switches. (I found cracks on the top of the trim, and also in the center near the round "plug" on the side) You have to purchase the covers as a set...you get both "outside" covers for the driver and passenger seat for about $50 at the dealer. A shame, since the passenger side is fine, but a satisfying repair I completed this afternoon.
I used these online instructions:
The only tough part was getting the center latch snapped back into the seat. This is the part that is pictured in the above instruction as the round "lumbar" switch. My sport seats don't have this, and instead has a plug, with a square boss that snaps into the seat frame....it was a struggle to get it to snap back in...took me about 45 minutes. You have to snap it in starting from the bottom, up and in...hard to describe until you attempt it.
Also, removing/installing the plastic push pin that is under the center of the seat is best accomplished from behind the seat....move it forward and angle the seat base up for more clearance. Move the seat only about 80% forward, rather than 100% will actually allow you to raise/tilt the seat up more.