Q&A

 Rookie

Double check that battery.

 Master

Check the battery connections to see if they are clean and secure. Check the battery voltage is 12.6 volts if you don't have a volt meter turn on the head lights are they bright? Try turning the ignition switch with the lights on do you hear a click or do the lights dim? That would show the ignition switch is trying to supply power to the starter. It is obviously something electrical perhaps the starter has failed, neutral safety switch, ignition switch, too many things it could be.

 Rookie

use your spare key . some times the key goes bad . If that does not work ,then the signal from the starter to the engine could be failing they will change out the box. YOu give them your lisence and they send in to BMW for the part ( I changed out the box because i was afraid that i would get stuck some where , in fact it was just my key going bad as I had the problem again , this time I used my spare key to start it and it started right up . )

Had this exact problem. Replaced the battery and still the lights would come on but car would not turn over. Then read the answer here from doral and yep.... the spare key started it right up. I'd try this first. Bet my original battery was fine.

it is the + LINE, THERE IS A SMALL BOX ATTACHED TO IT OPEN IT INSIDE CONNECTION IS NOT CONNECTED. THAT WILL TAKE CARE OF IT.

Had the same problem with my 2006, had to have the starter replaced.