This is a =n interior ultrasound monitor (for the alarm system) for the following cars Passat B7 2011 - 2015. Passat B6 2006 - 2011. Passat CC 2009 - 2012.
There are web pages to show how it is fitted. It takes about 1 hr to replace with Torx screw drivers and trim removal tools, it’s not hard to do. The sensor is located behind the overhead glass case. Solves the problem of intermittent false alarms. Product worked perfectly.