And, while leaking goals and being outplayed on their travels, they have taken the prized scalps of Manchester United and Everton with their Turf Moor form.
They were transformed to the more secure and positive thinking side back on their Lancashire territory, but had initially found the defensive 4-5-1 formation of a miserly Birmingham difficult to play through.
The first shot on target took nearly half an hour to materialise when Clarets striker Nugent let a Wade Elliott pass roll across him before letting fly with a well-struck shot that was saved by Joe Hart.
Blues forward Garry O'Connor was an isolated presence in attack for his side but they should have scored through Bowyer.
The midfielder was lurking at the far post and, instead of side-footing in Roger Johnson's shot across goal, the ball hit his heel and was inadvertently cleared for Burnley.
Coyle delighted with Fletcher goal
Larsson also had a gilt-edged chance for the visitors after Bikey gave the ball away for Burnley only for the Blues' substitute to shoot over.
The misses were punished when Burnley's record signing Fletcher ran on to a Tyrone Mears pass and ended a counter-attack by driving a left-foot shot in from the edge of the area.
Hart did not cover himself in glory by diving too early and seeing the strike go in off his legs.
Fletcher and Burnley were buoyed by the goal and the Scotland striker almost got a second only to chest down a cross and see his scuffed shot come back off the post.
Bikey made no such mistake when he fended off a challenge in midfield, surged towards goal, played a one-two with Nugent and powered in an angled shot.
McLeish bemoans 'worst' performance
Mears had a free-kick tipped over and Bikey put a free header high as Burnley ended up convincing winners, despite Larsson scoring with virtually the last kick of the game.
The visitors never looked like getting back into the game as Blues boss Alex McLeish suffered a defeat at the hands of Coyle - the man he recommended for the Burnley job.
Burnley manager Owen Coyle: "We have good players and a good team and are deserving of every point (at home).
"It was an outstanding performance and we should have won by more. Birmingham did not venture forward that much.
"It's been a horrible week because of injuries but the players again showed their character."
Birmingham boss Alex McLeish: "I was disappointed with the second-half showing.
"First half there was nothing in it, we had a couple of little sniffs and it would be good if we could score an early goal to build on.
"The disappointing thing was our reaction (to going behind) and I would say that is the worst we have played so far this season."
90:00+5:41 The referee blows for the end of the match.
90:00+4:41 GOAL - Sebastian Larsson:Burnley 2 - 1 Birmingham Sebastian Larsson grabs a goal direct from the free kick from just outside the penalty box to the top left corner of the goal.
Burnley 2-1 Birmingham.
90:00+4:01 Andre Bikey challenges James McFadden unfairly and gives away a free kick.
90:00+3:17 Wade Elliott sends in a cross.
90:00+2:40 Effort from outside the area by James McFadden goes wide right of the goal.
90:00+2:14 Foul by Tyrone Mears on Lee Bowyer, free kick awarded. Joe Hart takes the direct free kick.
89:09 Substitution Christian Kalvenes comes on in place of Robbie Blake.
87:19 Corner from right by-line crossed in by Chris Eagles.
87:13 The ball is delivered by Chris Eagles, Liam Ridgewell gets a block in.
85:53 Substitution Steven Thompson is brought on as a substitute for David Nugent.
83:45 David Nugent takes a shot. Joe Hart makes a save.
81:30 Tyrone Mears challenges James McFadden unfairly and gives away a free kick. Free kick crossed by Lee Bowyer, Steven Caldwell
manages to make a clearance.
80:37 The referee blows for offside. Free kick taken by Brian Jensen.
80:03 James McFadden takes a shot. Save by Brian Jensen.
79:05 Tyrone Mears concedes a free kick for a foul on James McFadden. Free kick taken by Lee Bowyer.
78:15 Outswinging corner taken from the right by-line by Robbie Blake, Header on goal by Andre Bikey from inside the box goes harmlessly
over the target.
76:38 Strike on goal comes in from Tyrone Mears from the free kick, save by Joe Hart.
76:38 Booking Stephen Carr shown a yellow card.
76:31 Foul by Stephen Carr on David Nugent, free kick awarded.
76:16 Liam Ridgewell produces a cross, clearance made by Steven Caldwell.
75:31 Corner taken right-footed by Robbie Blake from the right by-line, save by Joe Hart.
75:23 The ball is crossed by Chris Eagles, clearance by Barry Ferguson.
75:06 Liam Ridgewell concedes a free kick for a foul on Tyrone Mears. Graham Alexander takes the free kick.
72:57 Kevin Phillips handles the ball and concedes a free kick. The free kick is delivered right-footed by Graham Alexander from
71:44 Substitution (Burnley) makes a substitution, with Chris Eagles coming on for Steven Fletcher.
68:22 Andre Bikey challenges Barry Ferguson unfairly and gives away a free kick. Barry Ferguson takes the direct free kick.
67:50 Unfair challenge on Graham Alexander by Barry Ferguson results in a free kick. Steven Caldwell takes the direct free kick.
66:31 Substitution Kevin Phillips replaces Teemu Tainio.
65:39 Stephen Jordan crosses the ball.
64:19 The ball is swung over by Graham Alexander, clearance made by Stephen Carr.
61:20 David Nugent provided the assist for the goal.
61:20 GOAL - Andre Bikey:Burnley 2 - 0 Birmingham Andre Bikey finds the back of the net with a goal from inside the box to the bottom left corner of the goal. Burnley 2-0 Birmingham.
58:57 Steven Fletcher takes a shot. Save by Joe Hart.
58:51 Centre by Stephen Jordan, Liam Ridgewell makes a clearance.
57:58 James McFadden gives away a free kick for an unfair challenge on Tyrone Mears. Free kick taken by Graham Alexander.
57:05 Steven Fletcher produces a cross.
56:39 Steven Fletcher has an effort at goal from deep inside the box hitting the post.
55:18 James McFadden takes the outswinging corner, Liam Ridgewell has an effort at goal from close range which goes wide of the
55:05 Corner taken by James McFadden from the right by-line, Clarke Carlisle makes a clearance.
54:31 James McFadden takes a shot. Blocked by Steven Caldwell.
53:32 David Nugent challenges Liam Ridgewell unfairly and gives away a free kick. Teemu Tainio takes the direct free kick.
52:15 Assist on the goal came from Tyrone Mears.
52:15 GOAL - Steven Fletcher:Burnley 1 - 0 Birmingham Steven Fletcher fires in a goal from inside the penalty box high into the middle of the goal. Burnley 1-0 Birmingham.
51:11 Foul by Steven Caldwell on Garry O'Connor, free kick awarded. James McFadden produces a strike on goal direct from the free
50:47 David Nugent is ruled offside. Joe Hart restarts play with the free kick.
49:27 Direct free kick taken by Graham Alexander.
49:27 Booking Barry Ferguson is shown a yellow card for unsporting behaviour.
49:19 Barry Ferguson gives away a free kick for an unfair challenge on Tyrone Mears.
47:34 Effort on goal by Sebastian Larsson from inside the area goes harmlessly over the bar.
45:01 The second half kicks off.
45:01 Substitution Sebastian Larsson is brought on as a substitute for Keith Fahey.
45:01 Substitution Franck Queudrue goes off and Liam Ridgewell comes on.
45:00+1:06 The half-time whistle blows.
44:57 A cross is delivered by Stephen Jordan, save by Joe Hart.
44:32 Garry O'Connor takes a shot. Brian Jensen makes a save.
44:06 Wade Elliott gives away a free kick for an unfair challenge on James McFadden. Direct free kick taken by Barry Ferguson.
42:51 Graham Alexander sends in a cross.
42:19 Corner taken right-footed by Robbie Blake, clearance made by Roger Johnson.
41:57 Inswinging corner taken from the left by-line by Robbie Blake, clearance made by Garry O'Connor.
41:37 Outswinging corner taken right-footed by Robbie Blake from the right by-line, Garry O'Connor makes a clearance.
41:28 A cross is delivered by Wade Elliott, blocked by Barry Ferguson.
39:38 Free kick awarded for a foul by Wade Elliott on Keith Fahey. The free kick is delivered right-footed by Stephen Carr from
right channel, Tyrone Mears manages to make a clearance.
38:39 Unfair challenge on Teemu Tainio by Steven Fletcher results in a free kick. Direct free kick taken by Scott Dann.
37:49 Inswinging corner taken by James McFadden from the right by-line.
37:18 Centre by James McFadden, Lee Bowyer has an effort at goal from close in which goes wide right of the target.
36:52 Inswinging corner taken from the right by-line by James McFadden.
36:46 The ball is sent over by Stephen Carr, Stephen Jordan gets a block in.
35:49 Andre Bikey takes a shot. Blocked by Teemu Tainio.
34:34 David Nugent takes a shot. Save by Joe Hart.
33:03 Steven Fletcher concedes a free kick for a foul on Keith Fahey. Free kick crossed right-footed by Keith Fahey.
31:31 Steven Fletcher takes a shot. Keith Fahey gets a block in.
31:17 Graham Alexander takes a shot. Lee Bowyer gets a block in.
30:10 Barry Ferguson concedes a free kick for a foul on David Nugent. Steven Fletcher takes the direct free kick.
29:49 Wade Elliott takes a shot. Blocked by Stephen Carr.
29:05 Steven Fletcher sends in a cross, Scott Dann manages to make a clearance.
26:21 Centre by Graham Alexander.
25:18 Scott Dann gives away a free kick for an unfair challenge on David Nugent. Robbie Blake produces a strike on goal direct from
the free kick.
23:30 Booking Scott Dann receives a yellow card.
23:30 Free kick awarded for a foul by Scott Dann on Tyrone Mears. Tyrone Mears takes the direct free kick.
23:05 Foul by Stephen Jordan on James McFadden, free kick awarded. Direct free kick taken by Barry Ferguson.
22:22 Roger Johnson takes a shot. Blocked by Stephen Jordan.
21:24 Wade Elliott challenges Teemu Tainio unfairly and gives away a free kick. Franck Queudrue restarts play with the free kick.
20:55 The ball is delivered by Robbie Blake, save by Joe Hart.
20:28 Free kick awarded for a foul by Franck Queudrue on David Nugent. Tyrone Mears restarts play with the free kick.
16:07 Foul by Steven Fletcher on Franck Queudrue, free kick awarded. Joe Hart restarts play with the free kick.
15:31 Free kick awarded for a foul by Barry Ferguson on Steven Caldwell. Steven Caldwell restarts play with the free kick.
13:39 Scott Dann fouled by Wade Elliott, the ref awards a free kick. Free kick taken by Franck Queudrue.
12:18 David Nugent is flagged offside by the assistant referee. Joe Hart takes the indirect free kick.
11:47 Andre Bikey takes a shot. Blocked by Roger Johnson.
11:42 Robbie Blake crosses the ball, blocked by Stephen Carr.
11:15 Robbie Blake takes a inswinging corner from the left by-line played to the near post, save by Joe Hart.
11:08 Robbie Blake delivers the ball, blocked by Stephen Carr.
10:34 The assistant referee flags for offside against Garry O'Connor. Brian Jensen takes the indirect free kick.
9:26 Free kick awarded for an unfair challenge on Garry O'Connor by Clarke Carlisle. Franck Queudrue takes the direct free kick.
8:50 The assistant referee signals for offside against Garry O'Connor. Indirect free kick taken by Steven Caldwell.
7:54 Free kick awarded for an unfair challenge on James McFadden by Andre Bikey. The free kick is delivered right-footed by Stephen
Carr from right channel, clearance made by Clarke Carlisle.
7:33 Foul by Lee Bowyer on Andre Bikey, free kick awarded. Graham Alexander takes the direct free kick.
5:10 The assistant referee signals for offside against David Nugent. Joe Hart restarts play with the free kick.
1:41 The ball is swung over by Tyrone Mears.
1:05 Robbie Blake decides to take a short corner.
0:37 Steven Fletcher takes a shot. Scott Dann gets a block in.
0:00 The match begins.
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