It is going to make a light come on easier.
It is for Cali peeps only if you ask me. We don't have the same standard they do so why fix what ain't broke. I like has few warning lights on as possible.
These are all voluntary recalls, which means you can have it done if you want to have it done. It will not void any warranties. If will say this is a mandatory recall if you have to have it done. Then if you chose to not have a mandatory recall done you have to sign a waver stating that.
I have yet to have the reflash done on my car. It is known to loose power. This is why is think I will be fine not having this one done. It will not hurt the car at all to not have it done. So like I said if it ain’t broke don’t fix it.