Rear door control system for X3 2016-2020 electric trunk kit1、When closed, the trunk will stop and reopen when an obstacle is sensed, which can effectively prevent injuries and accidents. When opening, keep it at the desired height, press and hold the trunk button until you hear a beep, the trunk will automatically open and maintain that height. 2、All‑copper hydraulic seal, good sealing performance, full buffering, stable performance and no oil leakage. Passed repeated scaling tests. The service life is up to tens of thousands of times. 3、Air springs can provide greater lifting force, special springs can provide vertical force to start upper body movement, and small stainless steel washers can ensure smooth movement without noise. 4、It supports multiple control methods, which can be controlled by front and rear switches and buttons, which is simple and efficient. 5、Classic car paint process, has a beautiful appearance. According to the original car hole design, no additional holes are needed.