The BMW dealer replaced the main module because the locks were
malfunctioning. Sometimes the car couldn't be unlocked
with the remote key fob button, so I inserted the key into the door lock to
open the drivers door. Pressing the LOCK/UNLOCK button
on the center console sometimes would not get a response. Even reaching
across to manually open the passenger door would not
work.

After the repair, all seemed well until I tried the spare key that had not
been used by the dealer. It generates no response from
the car when the remote "open" is punched. Nor the trunk.

What the h*ll is going on?