car was in on friday to get a clunking type noise investigated, went for drive with one of the dealers chief monkeys, last time it was in the ecu unit was loose, so thought the noise might have been that, but the checked car over, put her up on ramp and found nothing wrong or in the dash, tonight i went over some speed bumps and think i figured it out, the passenger seat seems to be loose or something, really makes a noise when going over rough roads, can anything be done about this?