Steve Clarke's men continue their good run of form as goals from Zoltan Gera, Shane Long, Romelu Lukaku and Marc-Antoine Fortune seal the three points on Wearside
The Baggies took the lead with a spectacular strike from the Hungarian as he fired a belting shot into the top corner from 25 yards out. They doubled their advantage thanks to an error from Simon Mignolet as he spilled the ball straight into the path of the Irishman who tapped the ball home.
Craig Gardner gave the Black Cats hope of a revival when he scored from a long range free kick but these hopes were dashed when Liam Ridgewell was fouled in the area by Adam Johnson.
The on-loan forward smashed the ball home the penalty which despite a late goal from Stephane Sessegnon was enough for the win as Fortune sealed the points with a fourth goal.
The Black Cats had the first real chance of the game as Stephane Sessegnon met Sebastian Larsson’s cross and Myhill had to get down low quickly to make a good stop while McAuley hacked away the danger from the rebound.
Clarke’s side showed why it is going so well this season when it took the lead out of nothing thanks to a wonder strike from Gera who let fly with a left-footed shot from just outside the penalty area which sailed into the top corner of Mignolet’s net.
The Baggies doubled their lead in bizarre fashion when Brunt played a through ball to Long which Mignolet spilled right at Long's feet, and the striker took full advantage by rolling the ball into the net.
It could have gotten better for West Brom minutes into the second half as Long was put clear by a good ball from Yacob but this time Mignolet came out and made an excellent save to block the striker’s goalbound shot.
O’Neill’s side had lot of possession as it pressed to get a goal back but was unable to conjure any moment of magic until Gardner fired a free kick past Myhill into the top corner with the aid of a deflection.
West Brom continued to put in a solid away performance and almost put the game to bed when Ridgewell was fouled by Johnson in the box and referee Dean pointed to the penalty spot, from which Lukaku hammered home.
Sunderland, however, came back again as Sessegnon fired in from close range after Myhill had parried the ball to his feet but the Black Cats couldn’t force an equalizer as the Baggies scored a fourth through Fortune to seal the win.