2011-2017 BMW X3 (flush side rails) with Thule Motion XT XL Roof Cargo Box - YouTube
Roof rack bar with flush railing THULE Wingbar Evo for BMW X5 - YouTube
ERKUL Roof Rack Cross Bars for BMW X3 G01 2018-2022 | Anti-Theft Lock Aluminum Crossbars for Rooftop, Cargo Carrier, Luggage, Kayak, Canoe, Bike | Silver, Cargo Bars - Amazon Canada
BMW Roof Rack Base System - G01 X3 30i M40i (2018+)
MotorFansClub Cross Bar Fit for Compatible with BMW X3 F25 2011-2018 Roof Rack Crossbars Baggage Luggage Rack (Doesn't fit for 2019+), Cargo Bars - Amazon Canada