Playing the formidable CSK for a second time in two days, KKR, who lost by two runs chasing 135 in the first leg clash, had a stiffer target of 166 to chase at the Eden Gardens after skipper Gautam Gambhir won the toss and once again opted to field.
Chasing the target, KKR found themselves in a familiar position as they were reduced to 57 for three. But last season's top rungetter Robin Uthappa finally came good to steer the chase with a 58-ball unbetean 80, his 14th IPL fifty and first in this season. He struck seven boundaries and one six during his knock.
By virtue of this win, KKR (8 points) moved past RCB (7) to the third spot in the table but CSK remained at top with 12 points.
But the defending champions started their chase in a terrible fashion.
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On a day when it was required for their batsmen to seize momentum given by Hogg's incisive four for 28-run brilliant spell, their misery continued after skipper Gautam Gambhir (19), Manish Pandey (3) and Suryakumar Yadav's (2) early dismissals.
As KKR went into a shell and with the asking rate going up, Dhoni smartly brought in his inexperienced duo of Pawan Negi and More, who did not disappoint either by dismissing Pandey and Suryakumar Yadav respectively.
But Uthappa and Russell ensured that the packed house did not return disappointed.
Uthappa brought the crowd back on their feet when he slammed Ashish Nehra over his head and followed it up with two fours in the 15th over in which the veteran India seamer leaked 15 runs.