if you are changing your battery to another one with the same AMP ( BRAND doesn't matter ), ( 80 AMP to 80 AMP ) you do NOT need to get it coded, as your alternator will still charge the new battery as the same older one. (80 AMP in this case )
but if you change your battery to a bigger/smaller AMP bettery, you need to get it coded/registered to " tell " the alternator the proper AMP of the newer battery, so it doesn't over charge / under charge which will cause the malfunction of the battery in term of longevity.
and hell, $160 for coding the battery is extra raping from the stealerships, search around there's some threads over here shows how to code your car bettery VIA BT cable, there's no hassle and it takes 2 minutes MAX.
Last edited by Elie335; 11-30-2011 at 09:31 AM.