As with any connector (except the deans, if soldered properly) they wear out and need replaced, just hope you catch this before it pops off in a race!!!!! However for a motor in most cases if the connector becomes unconnected there is usally a problem that needs addressed and could save you alot of money, especially if the speedo comes untaped and is dangling off of the chassis, it is much better for the connector to break the circuit than having the speedo demolished later in the race........