Wenger, who has been with Arsenal since 1996, says he feels a "responsibility" to the young side he is building at the Emirates Stadium and now looks almost certain to stay on.
"Am I still motivated to go on at Arsenal? Yes absolutely. I am very motivated," Wenger told RMC radio.
"I am in talks with Arsenal. I can't see any drawback to extend. There will be some news on Thursday or Friday."
"We had a nice start to the season. We still have our technical game, and we have a young team that has got a little more experience," Wenger said.
"We lost the star of our club, Thierry Henry, so it has changed something indeed.
"But you know maybe it has pushed the youngsters to take on more responsibilities.
"It is a little early to take stock after three matches at home. Our real challenges will be away from home against the big teams."