For a while in 2018, the fobs that came with the M-Lock had a poor design with subpar glue inside them to hold the chip and they broke loose from the wires rendering them useless just like mine did. I could hear it rattle when I shook it a little. The new replacement fob is a bit thicker than the original and obviously more robust, hopefully inside as well as outside. If your original fob rattles when shook, replace it with this new and better redesigned replacement before it fails. It programs just as easily as the original and works great. And get a second fob as a backup. You never know when you might need it. $16 is much softer on the wallet than a whole new M-Lock. I thank Motogadget for fixing this issue. Larry
Great replacement or spare. Easy pairing.
So simple, no worth talking about it. Bought it with a glass tube key. Now look like a magician !