DELIVERY STOP: PROGRAMMING CONTROL MODULES (TAIL LAMPS). BMW of North America LLC has issued a Delivery Stop (effective October 24 2019) on a small number of Model Year 2020 BMW X6 vehicles that were produced in the date range shown above. In extremely rare instances dimming of the tail lamps in the "Welcome mode" and "Goodbye mode" could cause the left or rear tail lamps and/or brake lamps to not illuminate. It is unlikely that the left and right tail lamps will not illuminate simultaneously.