I have my nieces car 2015 Sentra. She dropped her wedding ring down the pass side defroster. I'm looking for some detailed photos diagrams of the ductwork, what might be the lowest point it has fallen. Or any advice you might have. I have a lot of car knowledge in paint and body side, so I can find my way a little bit. Thanks

Hi and welcome to NICO Club! Rings are easier to keep track of when worn on a finger, she should keep it there for the future.

We have what you need here:
http://www.nicoclub.com/service-manual? ... Sentra/vtl
http://www.nicoclub.com/service-manual? ... 0Sentra/ip
http://www.nicoclub.com/service-manual? ... Sentra/int

if those don't cover it, check the rest of the FSM:
http://www.nicoclub.com/FSM/Sentra/2015%20Sentra/

Centralcoaster33, I have been successful at retrieving the wedding ring. I had to remove the dash top pad. Needless to say a lot of other parts to get there. Thank you for your assistance and expertise.

Awesome! I'm glad the ring is back where it belongs. She's lucky she has someone who knows cars like you to help her. I bet she was worried.