When SSPX priests administer the Sacrament of Reconciliation are they valid? I would like to know.
No. They do not possess faculties from the local bishop to administer absolution.
Now, if you went to one for confession and did not know this, I believe that, in this case, the Church would supply.
Someone here will correct me if I am wrong.
I think where they are out of communion with Rome, the answer is “no”. However, as stated, if you confessed to one not realizing they were SSPX, I believe God would consider you absolved of your sins.
Rhetorical musing: Just wondering why anyone would choose to seek a sacrament from someone out of communion with the universal Church... I wonder what type of spirit would lead one there?