Bruno Fernandes converted a penalty in the 10th minute off added time after VAR intervened to award Manchester United a spot kick despite the full-time whistle being blown.
Neal Maupay was penalised for a handball infringement after Solly March appeared to have earned Brighton a point with his 95th-minute header.
Fernandes kept his cool to earn United their first Premier League win of the season after Lewis Dunk’s own goal and Marcus Rashford’s stunning strike overturned Maupay’s opener for the Seagulls.
Rashford also saw a goal ruled out for offside, while VAR intervened to reverse a penalty awarded to Brighton in the second half of a drama-filled fixture.
Manchester United vs Brighton encountered a chaotic conclusion as a late penalty handed the Red Devils victory.
Brighton thought they had snatched a point with an injury time Solly March equaliser.
But Neal Maupay was penalised for handball after a VAR check in the dying seconds – giving Bruno Fernandes a penalty after the final whistle had blown.
Referee Chris Kavanagh blew his whistle to end the game immediately after March headed Maguire’s effort off the line.
Yet he was immediately surrounded by protesting United players and went over to the pitch side monitor to check the incident.
Fernandes took the penalty, found the back of the net for a 3-2 win and the full-time whistle was again blown afterwards.