Defectively manufactured from the beginning. I have bought these specific ones twice, as the first time they got lost on the national road at different times, with approximately 140km. I couldn't find a different brand and that's why I bought the same ones again. They are slightly smaller in size, resulting in them moving up and down and not fitting properly in the door frame. I installed them with the two brackets that come with them to make them more stable, but over time they play more and more, and at some point they will get lost on a trip... Also, during installation, great care is needed because the part that goes into the door frame is thinner than the tint and easily breaks if forced. They were installed on a first-generation S3, which has the same door as the A3.