He trained on Tuesday morning and travelled with the squad to Birmingham, but a final decision will not be made on his fitness until later today.
Bayern boss Vincent Kompany said: 'I think you have seen he was on the pitch today. Training went well, we will still have to wait until tomorrow to see how the situation is and tomorrow we will make the correct decision.
Harry Kane will have a fitness test this morning to decide if he can face Aston Villa tonight
Kompany is back in England after leaving Burnley in the summer following their relegation to the Championship.
But he arrives with no regrets and says he has nothing to prove.
'I think it is important to separate things, every challenge you take on has totally different parameters, the context is totally different,' the former Manchester City defender added.
'It is most important for a coach to say you have done everything you could.
'As a coach you should have no regrets. I don't come here carrying things from the past. It is different players, different club, different season.'
Kompany was on the losing side against Villa twice last season and said Unai Emery delivered an 'extraordinary' campaign.
He added: 'You all know it has been 40 years since they had their last Champions League game here and last season was extraordinary for Aston Villa.
'They deserve to be here, it is a well-organised team and at home they have fantastic support.
'But Bayern Munich is used to those nights and I am sure the players will be highly motivated and we want to have fun as well.
'All in all I spent 13 years, my wife and children are English. But tomorrow it is all about Bayern Munich and hopefully we can achieve the result we want.
'That is important, I know this stadium very well, I know the manager very well and I have made lots of experiences and I can share them with my players. We don't want to change too much.'