PBKS won the toss and elected to bowl first under the lights, a decision that paid rich dividends as they restricted MI to 195/6 before knocking off the target of 196 with ease.
Mumbai Indians got off to a nightmare start, slumping to 12/2 inside three overs. Arshdeep Singh struck twice in successive deliveries, removing Ryan Rickelton for 2 and then the dangerous Suryakumar Yadav for a golden duck.
But Quinton de Kock, the veteran South African, refused to buckle. Dropped down to open after the early blows, he produced a masterclass, smashing an unbeaten 112 off just 60 balls (8 fours, 7 sixes) to keep MI in the contest.
He found solid support from young Naman Dhir, who bludgeoned a rapid 50 off 31 balls, stitching together a 122-run third-wicket stand that rescued the innings. Hardik Pandya (14) and Tilak Varma (8) added late cameos, but the total always felt a touch light on the high-scoring venue.
Punjab Kings' chase was ruthless from the outset. Opener Prabhsimran Singh set the tone with an explosive 80 not out off 39 deliveries (11 fours, 2 sixes), while captain Shreyas Iyer played with trademark elegance, smashing 66 off 35 (5 fours, 4 sixes).
The pair added 139 runs for the third wicket in just 66 balls, turning the game into a procession. Priyansh Arya (15) and Cooper Connolly (17) provided the early fireworks, and Marcus Stoinis finished things off with a quick 10 not out. The Kings reached 198/3 in just 16.3 overs, their highest IPL chase at Wankhede.
For Mumbai, AM Ghazanfar was the pick of the bowlers with 2/31, but the rest of the attack was carted around at over 12 runs an over. Arshdeep Singh (3/22) and Marco Jansen (1/30) were the standout performers with the new ball for PBKS, setting up the victory.
It was a night that belonged to the batters, but Prabhsimran Singh's blistering knock and Arshdeep's early breakthroughs proved decisive. Punjab Kings move up the table with a statement win, while Mumbai Indians will need to regroup quickly after this high-scoring defeat.
Royal Challengers Bangalore secured their fourth victory of the Indian Premier League season after beating Lucknow Super Giants by five wickets at the M Chinnaswamy Stadium.
Sri Lanka seamer Dilshan Madushanka will join Sunrisers Hyderabad for the remainder of this season's Indian Premier League after England fast bowler Brydon Carse withdrew from the tournament due to injury.
Chennai Super Kings condemned Kolkata Knight Rider to a fifth straight defeat in this season's Indian Premier League after a 32-run victory at the MA Chidambaram Stadium.
Jos Buttler has credited "little bit of space and time" after finding some good form with the bat during the Indian Premier League with Gujarat Titans.
