2020 CX9 Signature with 70,000 kms. Took to dealer at around 55,000 kms and had service manager and Mazda rep check it out and found nothing wrong. Since that time noise is worse. When accelerating from a stop or changing weight distribution on braking I get a loud knocking/ loud clicking noise from lower part of seat. Reaching down along left side of driver's seat, under seat controls, can feel the seat track with my fingers and feel the seat track react with noise. I can Suspect excessive play in seat frame. Anyone experiences this.