The 72-year-old is in the midst of his fourth stint with the Bundesliga giants after coming in as caretaker coach in October following the sacking of Carlo Ancelotti after a slow start to the campaign.
And, under Heynckes, Bayern are undefeated in their last six matches in all competitions, including a 2-0 win over title rivals RB Leipzig, and Ribery has credited their turnaround to the returning German.
“He [Heynckes] has breathed new life into the team and has welded us together,” Ribery told Kicker.
“He gives the players self-confidence and speaks to us strongly.”
He continued: “I’m very happy he’s back, he knows what I can do. When we met for the first time at Säbener Strasse, we fell into the arms, a special relationship, confidential, close, sincere, and Heynckes was responsible for it that I was so good in 2013.”