The ball joints are not meant to come apart.
BMW 37-14-6-752-797 REGULATING ROD
https://www.amazon.com/dp/B00NXY38F4...p_mob_ap_share
I actually bought this one before figuring out our was the wrong model for car without self leveling axle and just HID lights. I would buy the replacement and leave in the glove box until either it pops apart or you have the wheel off for some other reason and as you described replace at your convenience.