Not Mary, according to the Church.
but if you have done no sins, why would you need someone to save you from your sins?
To save you from original sin.
Original sin is a false teaching.
That is the heresy of Pelagianism, condemned in the Third Ecumenical Council at Ephesus in 431.
-A8
"That is the heresy of Pelagianism, condemned in the Third Ecumenical Council at Ephesus in 431."
That is an opinion (and council) of men, one I reject. Original sin is a teaching that defies the justice of God. Do we imprison or punish people for the crimes of their parents? No, even mortal men know that is not justice.