Nemanja Vidic broke the deadlock to set the stadium alight before Bastian Schweinsteiger, who was sent off for a second bookable offence late on, hit a superbly-taken leveller to reward the Germans for an authoritative display.
Danny Welbeck lashed the ball into the net from the Reds’ first attack, though his effort was ruled out, apparently for a high boot from the striker. Although Bayern dominated possession, David De Gea’s first save did not come until past the half-hour mark when he dived to claw away an Arjen Robben effort.
David Moyes’ men responded with Welbeck firing an ambitious shot at Manuel Neuer and Wayne Rooney having an effort blocked. After Alex Büttner escaped a handball shout, Welbeck spurned the first half’s clearest opening in a one-on-one with Neuer. A goal did arrive 13 minutes after the break. Rooney swung over a corner from the left and Vidic steered a cute header inside Neuer's left-hand post after being afforded too much room in the crowded box.
The equaliser was largely unstoppable as Mario Mandzukic headed down to Schweinsteiger, who smacked a rising drive into the roof of the net. After Valencia had a nervous wait to see if a sliding challenge would produce a second yellow, Robben twice went close and Schweinsteiger saw red for a tackle on Rooney. In the end, it wasn't pretty, but United matched the favourites for the competition with a whole-hearted performance.