Review on Upgrade Your BMW'S Handling With OCPTY'S 2-Piece Sway Bar End Link Set For 525I, 528I, 530I, 535I, 545I, 550I, And M5 Models by Andy Tran

One month after installation, these seem to be fine. These require a hex key to install, and the old ones required a Torx bit to remove. The size of the retaining nuts are smaller than the original equipment links these replaced. The original equipment links also had a serated seat, whereas these don't (see picture). Aside from the minor inconvenience of requiring different tools to remove the old ones and install the new ones, these differences doesn't seem to be an issue with regard to the functionality. Will change my review to give these 5 stars if they hold up long enough. Depending on the vehicle, having ratcheting box wrenches may make removal & installation much easier.