So I have a 2001 Nissan Maxima I tried starting it the other day and it just made a humming noise. So I thought it was a starter so i changed it and now its just making a spinning noise. So i think the starter is not engaging with flywheel but I don't know a lot about cars. Any feed back is appreciated.

 

maybe the fly wheels teeth broke? when u replaced the starter did u see and make sure it made contact with the teeth? did u even see the teeth on the flywheel? Auto? manual?

 

I didn't check the teeth i will though and its a automatic.

 

Yea check and report back.