Perfect rails for damaging your car. Rear rail carrier is glued to the bottom of water canal (2:23) thus blocking the water drain and retain of the water in the canal causing the rust. By tightening the rail carriers bolts (1:45) the bolts will damage the paint on the canal sides. Water+damaged paint=rust
Thank you for the video. That is what I am looking for for a 2018 Qashqai. Do you sell that rack? Can you tell us who makes it or give a link to where it is available?