4.0 - Sounds like the soundtrack to a 1981 cop comedy, maybe starring Dustin Hoffman and Danny Glover. They have to solve a murder case involving Colombian drug dealers. A wealthy heiress is the love interest. She’s modestly hot in a big-haired 80s way. There’s one sex scene where she’s wearing ridiculous lingerie and we see her tits for half a second. There’s a car chase, a couple explosions, one drunken evening that makes the main character question his choices, finally he cracks the case, the bad guys go to jail, he says goodbye to his partner and the girl. The last scene shows him moving back out West, giving up the cop grind, to work as a ranch hand.