BMW's modular roof rack system with coded bolts offers security and practicality. Made of high-tensile aluminum tubing, it is remarkably lightweight, strong and corrosion-resistant. Easy to install and is compatible with a wide range of aerodynamic attachments. (PN: 82 71 0 403 104)
From BMW it costs $219.95. I had mine on my vehicle for less than a month and it has been sitting in the original packaging for 9 months.
$125.00 plus shipping.