And Protestants also believe that both must be present. But this part of the issue, this debate, is really off-base, and that's the problem. Who is it that does the works? Is it Christ living in a believer, or does the believer credit them to himself, that they're done through his own will power? If the latter, then the believer is judging and commending himself, looking admiringly on what he has done as his own achievement, which is self-deception. That's making oneself like God in Genesis, as Satan does, and is a product of rebellious pride.
Um, no. Faith must be present and given time WILL evidence behavior becoming of the Family the faither has been born from above into. 'Works' are not even mentioned as a requirement to be born again, born from above. HOWEVER, given time the new man will exhibit the family in his/her behavior patterns. Without being born again, he/she will exhibit the family of fallen Adam. [The heart of man is desperately wicked, Who can know it?]
In Catholicism it is the grace of God that accomplishes any good works that we do.