From CNA:
“We don’t need to say that Mary is co-redemptrix, that Jesus needs Mary to save humanity. Mary herself is prepared, saved by God; she is a creature of God. She makes herself the servant of her own son, but she is not co-redemptrix; she is now our intercessor,” Archbishop Juárez Marqués of Teresina, Brazil, declared on Nov. 27. In an interview with a local television station, the archbishop referred to the publication of the document Mater Populi Fidelis (“Mother of the Faithful People of God”), issued by the Dicastery for the Doctrine of the Faith on Nov. 3.
The document discourages the use of the “co-redemptrix” title for Mary, considering that “some titles, such as that of Mediatrix of all graces, have limitations that do not facilitate a correct understanding of Mary’s unique place.”