City rode a dominant first half to a comfortable victory at The Hawthorns, as Fernando, Yaya Toure and David Silva found net.
Manchester City made the most of a sluggish showing from West Brom as the Premier League champion eased to a 3-1 win at The Hawthorns.
Despite being without captain Vincent Kompany, Sergio Aguero and Edin Dzeko through injury, Manuel Pellegrini's side took advantage of a dismal opening period from the hosts to keep pace with leader Chelsea.
The visitors were handed an early gift courtesy of Ben Foster, as the West Brom goalkeeper dropped a looping Jesus Navas cross eight minutes in. Midfielder Fernando took full advantage to cleverly register his first goal for the club, with ex-City defender Joleon Lescott also aiding his former employers' cause soon afterward.
David Silva went down under Lescott's challenge inside the area and, when Yaya Toure subsequently doubled City's advantage from the penalty spot, the visitors were well on course for a ninth consecutive win in all competitions.
Despite rarely getting out of first gear, the champions were three to the good 11 minutes before the interval when Silva calmly steered a strike past Foster.
An improved defensive effort from West Brom kept the score respectable after the break, and the home side finally got on the score sheet itself when Brown Ideye scored after a scramble late, but it proved to be too little, too late for Alan Irvine's men.
Fernando was the man on hand to acrobatically hook the ball home and open his account for the club, with things going from bad to worse for Irvine's men five minutes later as Lescott stretched to make a challenge and brought down Silva inside the area.
Toure confidently dispatched the penalty to Foster's right to put the visitors in cruise control.
Despite offering a threat going forward, West Brom remained susceptible at the back and that proved to be their downfall before the break, Silva the man to benefit this time.
Following a quick counter, the Spaniard expertly curled Navas' cutback home left footed to leave West Brom facing an uphill battle.
In stark contrast to the first half, the hosts had the better of the play early in the second period, despite worsening wintry weather conditions in the West Midlands.
Hart was required to deal with a dangerous Craig Gardner cross before Navas fired City's first effort of the half off target.
With three minutes left, West Brom did pull one back when substitute Ideye helped the ball over the line following a corner kick to register his first Premier League goal, but a comeback was never on the cards.
Although Irvine may take heart from his side's improved resilience after the interval, a fourth defeat from the club's last five top-flight home outings will be a cause for concern for West Brom, while City's bid to reel in Chelsea in the title race remains very much on course.