Is it possible to replace this lamp and does anyone have any experience or sage advise to offer? Tried search and didn't find anything relevant.

Most likely it's integrated, so replacing the bulb won't be possible. You're most likely going to have to replace the entire assembly. Although if you're feeling adventuresome you could try disassembling yours to see if there's a bulb inside, and if so what type.

Part Description: Controller Assy-Air Conditiner
Nissan Part No.: 27500-1VL0C Retail Price: $360.87


You're in luck as there is someone selling used ones on fleabay for $30 + $10 shipping.

Thanks for the link.