Intermittent complete electrical failure - Bad BCM?

MarkL

I'm having an intermittent starting problem that may be related. Most times, the car (2011 370Z) starts fine, but sometimes I have to push the start button several times before it starts. The switch on the clutch pedal checked out OK, and the local Nissan shop found nothing else amiss. HQ technical support recommended replacement of the BCM (about $700), but the problem recurred. Now, the HQ tech wizards have diagnosed that a relay has gone bad, which will require replacement of the IPDM ($1,600).
After reading the previous posts, I checked my records and found that the problem started AFTER I had the battery replaced recently. I'll check the battery and post again if I find something amiss.