I am installing new air bags I need some help 2001 corolla

I have new airbags for my corolla and have the old ones are ready to put them back to gether , I want to know if there is a module that has to be changed with the new ones , I was told there are some that do not need the module , I know that the bags themselves have one , is their a main one that also needs changed , it is a 2001 corolla le model .I am not familier with toyota and do not have a manual to tell me so if you can supply any help , if it does have on where is it exactly ,I have it all apart and cannot seem to locate it ,I know what it looks like . thanks

you donot need to change the modul just installed the air bags and if you have scanner check the weather air bag is functioning