It’s one of the known problems with the model, so know you aren’t the first person to deal with this! The average cost to replace the transmission on your 2016 Nissan Sentra is between $3,500 and $5,500.
Depending on where you live and the shop you visit, your price could be more or less. Rebuilding your transmission versus completely replacing it will also be a bit cheaper.
Before deciding on the first mechanic you see, make sure you shop around and get quotes from at least three shops. Doing so ensures you’re paying a fair price for the replacement if you decide to move forward with it.