BURNLEY'S winning league start to 2013 came to an end in dramatic fashion, as Marlon King fired in a late volley, after the Clarets had been reduced to 10 men.
Dean Marney was given his marching orders in the 61st minute for a crunching tackle on Paul Robinson in midfield.
The midfielder felt hard done to after winning the ball, but he had left the former Bolton Wanderers defender in a heap in the process.
Burnley had previously equalised through a Ross Wallace penalty.
Birmingham had taken a 21st minute lead when Curtis Davies headed in Ross Hall's corner.
The Clarets searched for an equaliser before the break, with Chris McCann forcing a save from Jack Butland. Danny Ings had missed a trio of early headers.
Burnley started the second half well, with Danny Ings denied by the post and Jack Butland producing a super save to keep out Sam Vokes.
But the equaliser quickly came - 10 minutes into the second half - when Junior Stanislas was brought down by Robinson and Ross Wallace buried the spot kick.
The Clarets were reduced to 10 men soon after, when Marney thundered into a midfield challenge, won the ball, but sent Robinson flying.
Referee Darren Drysdale immediately reached for his pocket and produced a red card.
Burnley continued to take the game to the visitors. Danny Ings was , and looked certain to earn a point until the closing minutes when Marlon King cracked in an unstoppable volley from substitute Nikola Zigic's flick-on.