honda jazz 2003 ecu replaced!

[JIMMYQ]

hi guys friends got a honda jazz on a 2003 i was involved in a bump he's bought a new airbag ecu but the light is still on the error is ecu replaced

is there a way of coding the new ecu in?

the old ecu with crash data is

77960-saa-e812-m1


the new one

is 77960-saa-g821-m1

dont really fancy taking the mcu off to clear it :(

thanks