The 2017 BMW 4 Series 440i xDrive is equipped with dual front knee airbags, front side airbags, rear side curtain airbags, front side curtain airbags, regenerative braking system, 4-wheel abs, emergency braking preparation, cornering brake control, auto-locking power door locks, brake drying, ventilated disc rear brake, alarm anti-theft system, braking assist, hill holder control, ventilated disc front brake, dual front airbags, vehicle immobilizer anti-theft system, power brakes, latch system child seat anchors, electronic brakeforce distribution, stability control, traction control, occupant sensing passenger airbag deactivation, front seatbelt pretensioners, front seatbelt force limiters, front emergency locking retractors, post-collision safety system impact sensor, alert system impact sensor, battery disconnect impact sensor, door unlock impact sensor, rear emergency locking retractors, front seatbelt warning sensor, fuel cut-off impact sensor.