Nike Magista Obra FG UK Nacho Monreal whipped a ball in from the left, which Walcott sent goalwards with a bullet header from six yards. Neuer threw out a strong hand to somehow claw it off the line, with Aaron Ramsey unable to scramble the loose ball in at the far post.
Nike Tiempo Legend V UK Arsenal resumed the second half with spirits raised from their positive spell, but were soon back on the defensive as the busy Douglas Costa sent a 20-yard rising drive just over.
Wales midfielder Ramsey pulled up with what looked like a hamstring injury on 57 minutes and was replaced by England's Alex Oxlade-Chamberlain.
Bayern were in again when Robert Lewandowski was played clear on the right side of the Arsenal penalty area, but Cech made a superb save with his chest to send the ball over the bar and deny the in-form Poland forward.
Nike Mercurial Superfly IV UK It proved a crucial intervention as Arsenal snatched the lead with 13 minutes left.
A deep free-kick from Santi Cazorla caused panic in the Bayern box, where Neuer was caught in no man's land, flapping at the loose ball and Giroud, just on for Walcott, was perfectly placed to bundle a stooped header into the empty net.
Nike Elastico Superfly UK With the clock running down, Lewandowski turned into the right side of the penalty area, but delayed his shot under pressure from Laurent Koscielny.
Nike Mercurial CR7 UK Arsenal broke deep into stoppage time, with Hector Bellerin scampering away down the right. His low cross was side-footed goalwards by Ozil. Although Neuer pushed the ball out and Oxlade-Chamberlain scuffed the rebound over, the additional assistant correctly ruled Ozil's shot had crossed the line.
