Every time I did this, on any of my other cars, it has bitten me in the ass every time. Those non OEM switch blades can be made to accept the buttons from factory. Didn't try this on the X but worked on older bimmers and lexus. Problems were. The stupid blade springs would break. The case would fall apart. The key broke on me once in the ignition. The cheap shit metal just couldn't take it like the factory key. Unless someone makes a quality part, don't bother with this.

don't forget, our keys also get charged while in the ignition.