This job was pure hell !! I'm a DIY mechanic I do everything suspension brakes, intake manifolds, brakes, etc this was the worse car experience I ever had and I'm over 50 years old. I want to punch the BMW engineer in the face who created this over complicated door mechanism that is junk and prone to failure. A few days ago 12/23/22 very cold freeze days, opening the door I broke my handle carrier passenger side. Common problem, simple replace the door carrier right? After replacing the door carrier (that took about 6 hours of hell) upon the door locking, I couldn't get it open from outside or inside. I found this thread, luckily I didn't have to resort to this method as trying it maybe 30 times the door finally opened. The root cause thanks to amazon reviews, was the cable on the aftermarket part was like a 2 millimeters short causing the unlock not to work. I could write a book, tons of videos on youtube and no one tells you the finer details of likely problems you will face. My recommendation to most people, pay someone it will worth the money.