The Totters took a 2 goal lead through a Martin Petrov penalty and an own goal from Billy Jones but stay in the drop zone after two late goals from Chris Brunt and James Morrison.
Mark Davies won a penalty converted by Martin Petrov against the run of play in a first half controlled by the Baggies, and got a lucky second after fortunate deflections of Petrov’s cross from Liam Ridgewell and Billy Jones.
Roy Hodgson’s side came back to get the reward its play deserved later in the game when Chris Brunt fired in from the edge of the box and then substitute Simon Cox set up fellow arrival James Morrison for the late equalizer.
Bolton started the game against the already-safe West Brom in 18th place in the relegation zone behind QPR on goal difference, and three points behind Wigan and Aston Villa.
Owen Coyle again started the match with a front two in the form of David N’Gog and Kevin Davies, and Chris Eagles gave his side a bright start hitting the side-netting inside two minutes with an audacious swerving shot from outside the box.
However it was West Brom which saw more of the ball in the opening few minutes, exerting greater control in midfield having omitted winger Jerome Thomas in favor of central midfielder Keith Andrews.
Marc Antoine-Fortune, in for Peter Odemwingie in attack, headed into Adam Bogdan after beating Tim Ream in the air to a left-wing cross, while partner Shane Long tested the keeper with a shot from the left edge of the box.
Bolton took the lead against the run of play after winning a penalty when Davies went down under in the box under pressure from Keith Andrews and Youssouf Mulumbu. Petrov drilled his penalty into the left corner where it found its way into the net despite a touch from the diving Ben Foster.
However Owen Coyle’s side got a second goal shortly after bringing on top scorer Ivan Klasnic, who found Petrov running down the left flank for the Bulgarian to send in a low cross that Ridgewell intercepted only for it to be cruelly deflected past the despairing Foster by Jones.
Brunt got a goal back almost immediately for the Baggies after connecting sweetly with the ball on the edge of the box to fire into the bottom left corner after a tackle on Shane Long took the ball into his path.
The late goal heralded 15 minutes of backs to the wall defending from Bolton punctuated only by the substitute addition of Lee Chung-Yong following his long absence with a broken leg.
Their hopes of three points were shattered when with 30 seconds of normal time remaining the impressive substitute Cox threaded the ball from the edge of the box into his fellow arrival Morrison who rifled in from the far post to leave the Trotters two points below safety.
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