Received a Customer Satisfaction Initiative letter today, telling me that Nissan will replace the Bose amplifier for free.

I have had one amp replaced, but I think this one is a fix from Bose.

 

There are 2 TSB's out on this: 03-086 & 087. There are other threads about this. Even if you had your amp replaced already it may have been done with the one they would use this time in which case they wouldn't change it. Either you can check the amp part number yourself or take it to the dealer.