Lahiri totalled one-over 289 over four days and earned USD 16,415.
American Ryan Moore (67) successfully defended his title after a holding off the combined challenges from last year's runner-up Gary Woodland (67), Kevin Na (70) and Sergio Garcia (69) who were all tied for second.
Tied for the overnight lead, Moore, 31, produced glorious golf down the stretch at a sun-kissed Kuala Lumpur Golf and Country Club to shoot a five-under-par 67 for a three-stroke victory. He pocketed USD 1.26 million with his winning total of 17-under-par 271.
Starting on the 10th, he bogeyed 12th and then birdied 13th and 14th. A double bogey on 17th was followed by a birdie on 18th as he turned in even par 36. On the second stretch he birdied first and fifth, but bogeyed third and double bogeyed his closing hole, the ninth. Overall he had four double bogeys during the week.
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Talking about expectations, he said, "Not really. I think it's more to do with my own expectations. You know, I expected myself to play better, play more consistently, and you know, I just was nowhere near my game right from the start.
"I had great difficulty adjusting to the greens this week, which is disappointing considering again that I played it a lot. So lots of negatives this week that I need to work on and turn into strengths."
Na, a former Asian Tour rookie of the year, battled tooth-and-nail with Moore for much of the final round but missed makeable birdie chances on 14 and 16 before his hopes took a dent when an errant tee shot on 17 got stuck in the trees that led to a double bogey.