It is not unusual for vehicle manufacturers to use similar or identical keyless entry systems on multiple vehicles. Sometimes, these systems have identical key fobs with different part numbers.
As a case in point, Honda used factory and dealer-installed keyless entry systems on a variety of vehicles from 1997 on that used 4-button remotes with FCC ID E4EG8DJ. For instance, Honda remote part 72147-S2A-A01 was used on 2-door Honda S2000 vehicles from the 2000 through 2009 model years. But a system using an identical part with a different Honda part number, 72147-S10-A51, was used on the 5-door 1998 Honda CR-V.