The 22-year old New Zealand striker grabbed the Foxes third goal at King Power Stadium in the 88th minute after replacing Jamie Vardy with just under 20 minutes remaining.
Wood, who has struggled with injury this season, latched onto a pass from Matty James to fire home with two minutes left for just his second league goal of the campaign.
The goal from the All Whites youngster came after Vardy and David Nugent had the Championship leaders two goals ahead just after the half-hour mark.
Foxes boss Nigel Pearson, who saw his side stay eight points clear of second-placed Burnley, was thrilled to see Wood get the reward for working hard to get back to full fitness.
"And I was pleased for Wood to come on and get a goal after being out because of injury," said Pearson after the match.
"It was good to have three strikers score the goals."
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