After a lethargic loss in Game 3, the Lakers showed their composure to bounce back and seal victory with a stellar second-half performance.
James led all scorers with 28 points, 12 rebounds and eight assists.
His teammate Anthony Davis added 22 points, nine rebounds, four assists and four blocks.
Jimmy Butler and Tyler Herro finished 22 and 21 points, respectively, to lead the Heat.
Despite not producing one of his more prolific performances, James rated it as one of his best ever.