Diego Costa was sent off in second-half stoppage time as Wolves secured a rare away point at Brentford but still remain in the Premier League bottom three.
The striker was sent off for violent conduct after appearing to headbutt Brentford's Ben Mee.
Earlier, Ruben Neves' equaliser cancelled out Mee's superb volley early in the second half.
Wolves move up one place to 18th, while Brentford go up to 11th.
An attritional and injury-laden first half gave way to a livelier second period, with Brentford's Ivan Toney missing from close range late on.
But the Bees' prolific striker was also booked for his fifth yellow card of the season, meaning he will miss their next outing against Nottingham Forest.
Costa, 34, had become more of a threat as the game developed and forced David Raya into making a save with a shot from a tight angle, before being dismissed for the first time in the Premier League.
