M'Bia sees red as QPR goes down
Queens Park Rangers' Stephane Mbia
M'Bia took an early shower in the 78th minute after a challenge on Arsenal captain Thomas Vermaelen with the game scoreless up to that moment.
And with bottom placed QPR a man-down, Arsenal added pressure and got the winning goal six minutes later.
Spanish midfielder Mikel Arteta kept his cool on the line to finish off a rebound to scoop the ball over Julio Cesar.
However, in the midst of all the joy including a late rally from 10-man QPR, there was an injury concern for Arsenal striker Gervinho.
The Cote d'Ivoire striker left the pitch in the 78th minute with a knock.
On a brighter note, Wenger should be pleased with the return to first team action of Jack Wilshere who was outstanding for Arsenal in a modest game by both sides.
The England midfielder played in competitive action for the first time since May, 2011 after a long injury layoff.
Wilshere had a spectacular attempt from range in the 18th minute parried by Cesar after a neat one-two with Santiago Cazorla.
Arsenal's win over QPR also ended a two-match winless streak after losses to Norwich away and Schalke at home in the Premiership and Champions League respectively.