2005nissan Murano turned it off n won't start going on 3wks

Need a little more info. Are u saying it won’t crank? Or are you saying it cranks but won’t start? If it don’t crank, you either need a new battery, battery needs charged, which could also be caused by a bad alternator. If your saying it cranks but won’t start, it could be a number of things. I’d spray some starting fluid into the throttle body and have someone crank it over. If it starts and dies, it’s not getting gas. Could be a fuel pump relay which is in the fuse box under the hood usually, or it could be a bad fuel pump assuming it’s not a bad wire. If it won’t start with starting fluid while cranking, it’s gonna be an electrical issue. A crank position sensor is pretty common to cause a crank but no start. That’s just the common stuff that usually happens. It could be your ecm as well. That’s not as common tho.

Please read my notes at the link.