For enhanced safety, the front and rear seat shoulder belts of the Lincoln Nautilus have pretensioners to tighten the seatbelts and eliminate dangerous slack in the event of a collision and force limiters to limit the pressure the belts will exert on the passengers. The BMW X6 doesn’t offer pretensioners for its rear seat belts.
For enhanced safety, the front seat shoulder belts of the Lincoln Nautilus are height-adjustable to accommodate a wide variety of driver and passenger heights. A better fit can prevent injuries and the increased comfort also encourages passengers to buckle up. The BMW X6 doesn’t offer height-adjustable seat belts.
Both the Nautilus and X6 have child safety locks to prevent children from opening the rear doors. The Nautilus has power child safety locks, allowing the driver to activate and deactivate them from the driver's seat and to know when they're engaged. The X6’s child locks have to be individually engaged at each rear door with a manual switch. The driver can’t know the status of the locks without opening the doors and checking them.
Both the Nautilus and X6 have rear cross-traffic warning, but the Nautilus has Rear Cross Traffic Braking (automatically applies the brakes) to better prevent a collision when backing near traffic. The X6’s Cross Traffic Warning doesn’t automatically brake.
Both the Nautilus and the X6 have standard driver and passenger frontal airbags, front side-impact airbags, driver and front passenger knee airbags, side-impact head airbags, four-wheel antilock brakes, all wheel drive, traction control, electronic stability systems to prevent skidding, crash mitigating brakes, post-collision automatic braking systems, daytime running lights, lane departure warning systems, blind spot warning systems, rearview cameras, rear cross-path warning and driver alert monitors.