The Black Cats fell a goal down in the 29th minute when George Hall converted a close-range chance for the visitors.
Sunderland responded, though, as Trai Hume equalised on the stroke of half-time, before Amad put his side ahead 15 minutes from the end.
The hosts were forced to hang on in the closing stages after a red card for Dennis Cirkin, but managed to claim all three points.
Here, we take a look at the best photos of fans throughout the day courtesy of our photographer Frank Reid:
1. Sunderland fans
Sunderland came from behind to beat Birmingham 2-1 at the Stadium of Light to move into play-off contention with our cameras in attendance to capture the action. Photo: Frank Reid
2. Sunderland fans
Sunderland came from behind to beat Birmingham 2-1 at the Stadium of Light to move into play-off contention with our cameras in attendance to capture the action. Photo: Frank Reid
3. Sunderland fans
Sunderland came from behind to beat Birmingham 2-1 at the Stadium of Light to move into play-off contention with our cameras in attendance to capture the action. Photo: Frank Reid
4. Sunderland fans
Sunderland came from behind to beat Birmingham 2-1 at the Stadium of Light to move into play-off contention with our cameras in attendance to capture the action. Photo: Frank Reid