Good move IV! Depreciating assets are a drain. There's a good chance your Sentra has a lot of life left. As I post every few months (weeks?) my Nissan truck has 315k and runs great. I haven't had a car payment in 11 years. That's a lot of free after tax money.
Being the owner of a Nissan Altima (which is paid off) and a Nissan Frontier (which will be paid off next year), I love to see you post this.
The Altima has 89k and the Frontier has 59k. And I'm a firm believer in running them until the wheels fall off.
I have a '96 S-10 that I still drive to work once or twice a week just to run it, and it's approaching 200k.