Karleigh Osborne's second goal on successive Saturdays rescued a point for the Bees at Griffin Park.
His injury-time effort - scrambled in from a couple of yards - ensured Brentford escaped with a 1-1 draw against Darlington. The result knocked the visitors off the top of the table and allowed Wycombe to take over as League Two pace-setters.
Darlington had taken the lead on the hour with a Richie Foran, but the Bees dominated possession and territory and deserved a share of the spoils.
It was the third time this season the Bees have managed to knock the top side off the top follwing wins against Dagenham and a draw with Wycombe earlier this season.
The result keeps Andy Scott's men in the play-off places, although they drop to seventh in the table.
They have a chance to close the six point gap between themselves and Wycombe tomorrow night when they travel to Luton Town - who lost 2-0 at Rochdale on Saturday.