Lukas Jutkiewicz's second-half equaliser earned Birmingham a deserved replay as their fourth-round FA Cup tie at Huddersfield ended 1-1.
Jutkiewicz arrowed home a low shot nine minutes into the second period after Steve Mounie's emphatic header had given the Premier League side an interval lead.
Another bite at the cherry was just reward for Steve Cotterill's Sky Bet Championship strugglers, who comfortably held their own against Huddersfield, who still look out of sorts after their recent top-flight struggles.
Jarrod Bowen scored one and set-up another as Hull progressed to the FA Cup fifth round with a 2-1 win over Nottingham Forest at the KCOM Stadium.