bug sigma fob and key
 

i have a 2002 wrx bug and was wondering if the 2 buttons on the key immobilise the car i cant test at this moment because it seems the battry is dead in the key and dont have 4 digit code for the keypad either so if i lose this 1 fob i think i could be in real trouble!! basically just want to know if key will immobilise car i know it locks and unlocks same as fob but does it also immobilise the car????????