You can buy a brain separately. I did and keep one on hand pre-programmed just in case I ever have an issue with my Apex. While I have 4 or more trouble free years on my Apex, I figure you can't be too prepared and as such, have a pretty big inventory of spares from Apex components to pumps. All of which are ready go. Heck, even my spare pumps have the unions installed so I can swap them out in a moments notice with only a couple minutes down time.