"Peter Dohm" wrote in message
...

"Matt W. Barrow" wrote in message
...


The odds of that are millions to one...about like your neighbor having
the same code for their garage door opener.

Actually, there are surprisingly few codes on any given frequency,
especially since each key fob uses three and sometimes four of the
available codes--for open/close/panic and typically trunk release. It is
actually a fraction of the codes available for a typical four tumbler key
lock for any given type of key blank--so you can probably think of a
transmitting frequency as being analogous to a style of key blank.

IIUC, a fob can have one frequency and over one million correlation codes.