▁transm its ▁it ▁to ▁the ▁engine ▁management ▁system . ▁Without ▁the ▁correct ▁code ▁sequence , ▁the ▁engine ▁is ▁not ▁allowed ▁to ▁start . ▁ ▁In ▁addition ▁to ▁the ▁key ▁imm obil iser , ▁Sub aru ▁Australia ▁also ▁install s ▁a ▁dual - stage ▁security ▁system ▁( as ▁came ▁fitted ▁to ▁previous ▁Im pre za ▁ST is ). ▁The ▁remote ▁lock ing ▁transmit ter ▁represents ▁the ▁first ▁stage ▁of ▁security , ▁while ▁a ▁console - mount ed ▁numerical ▁key pad ▁forms ▁the ▁second ▁stage . ▁To ▁dis arm ▁the ▁ 6 ▁points ▁of ▁imm obil isation , ▁the ▁correct ▁four - digit ▁code ▁must ▁be ▁entered ▁into ▁the ▁key pad . ▁The ▁system ▁also ▁features ▁an ▁anti - h ij ack , ▁mode , ▁intr usion ▁alert , ▁false ▁alarm ▁prevent ion , ▁internal ▁sc ream er ▁sir en , ▁in fr ason ic ▁sensor , ▁v alet ▁mode ▁and ▁anti ▁cross - pol lin ation ▁software . ▁ ▁The ▁B 4 ' s ▁instrument ▁cluster ▁is ▁back lit ▁and ▁del ivers ▁excellent ▁visibility ▁under ▁all ▁conditions . ▁The ▁clock ▁rings , ▁pointers ▁and ▁the ▁cal ibration ▁data ▁are ▁sequ entially ▁ill umin ated ▁once ▁the ▁ign ition ▁is ▁switched ▁on . ▁ ▁American ▁car ▁audio ▁company ▁Mc Int osh ▁spent ▁ 1 2 ▁months ▁in ▁Japan ▁custom ising ▁a ▁sound ▁system ▁to ▁suit ▁the ▁ac oust ics ▁of ▁the ▁B 4 . ▁The ▁double - D IN ▁head ▁unit ▁incorpor ates ▁a ▁single ▁CD ▁player , ▁tun er ▁and ▁c ass ette ▁deck