The DJ has been mixing beats long enough to have lost his hair, and have his stubble turn white.

It’s been a long time since he acquired the nickname, “The Godfather of French Touch,” even longer since he was Emperor of Ibaza and King of All the Clubs. The man’s on the back nine of his career, if not his life. Scorpex, as he bills himself, could use a hit, a real “Banger” that’d put him on the charts and back in demand.

But the 50something Frenchman knows his stuff. It’s in his blood. When Scorpex tries a new droplet drug called Angel Rocket, he trips his testicules off, collapsing on somebody’s Citroen down the street from the club. But as the car alarm claxon wails off and on, he adds a beat with his fingers, drumming on the car’s hood, making music even there.

The pleasure of that whimsical moment is doubled by the fact that the great French actor Vincent Cassel, of “Mesrine,” “The Three Musketeers,” “Trance” and a whole lot of movies you and I have loved performs it.

Long review short, “Banger” is strictly formula, a B-movie action comedy with a few laughs and barely an original touch to it. But Cassel is funny and brings a welcome lightness to his role. And immersing a player with his resume and almost-60-years in this milieu is kind of a Dad Joke lark.

Kanye music video director So-Me knows this world, at the intersection of music, dance and fashion shows. But all he and a couple of co-writers could come up with was genre cliches for a story.

Consider — DJ Scorpex is discussed by a French drug agent (Laura Felpin) who has to “explain” to a clueless 40ish colleague what DJs are, what they do and how they make their money fifty freaking years after the birth of hip hop, accompanied by rap, techno, trance, etc.

The agents blackmail Scorpex, real name Luis, into helping them ID and photograph a mysterious drug underworld kingpin, Dricus. How many times have we seen that screenwriter crutch trotted out? The authorities will wipe Luis’s unpaid tax debts if he does this.

“No risk involved,” Agent Rose assures him (in French with subtitles, or dubbed. But watch it in French).

Scorpex has a protege who stole his “X” and became the club superstar of the moment as Vestax (Mister V), and he’s who the French feds are watching for his Dricus connection.

There’s a Russian mobster named Molo, short for Molotov (Alexis Manenti, funny and scary) whom Vestax is close with, a guy with a musical agenda and a hook-up for a big fashion show gig. Scorpex has to pal around with Vestax until Molo decides it was his idea all along to book a “Double X” gig with the two for that fashion show, which the feds figure is where a big drug mob “meet” will happen.

And Scorpex has an adult daughter (Nina Zem) who would like to have a closer connection with her father as she dabbles in DJing and mixing, fashion modeling and painting. Scorpex needs to protect her as he backs into this “espionage” gig, all the while hoping for a fresh break that’ll mark his “comeback.” Not that he’d call it that.

He’s memorized the has-been’s mantra — “I never LEFT!”

The action is limited and goofy — a game of “Name that Tune” that involves teams throwing knives at the DJ who can’t “Name that Tune,” hanging-out-the-car-door torture, drinking and drugging binges. other “tests” by the mobsters and the like.

Nope. Nothing much new to see here.

But watch how Cassel’s Luis lies and charms a blundering DJ away from the turntables in a way that allows the kid to save face and never know he’s having an off night. Pick up on the fatherly advice to younger performers from the guy who was an absentee dad.

Watch him piss off a generation “snowflake” vocalist, only to pull a brassy Black fashion designer (Déborah Lukumuena) into the studio on a whim. She’s full-figured and Black, she must rap, right? And have grievances to rap about?

And chuckle at the invention of that blitzed musical moment on a Citroen’s hood.

The music drops are good enough to pass muster, and the peformances mostly transcend the tried and trite story and the frankly pedestrian direction.

That makes “Banger” not quite the banger it was supposed to be.

But Cassel has the moves and the “Ibiza abs” to pull it off, from dancing at the turntables to shooting pool in the nude (An homage to Inspector Clouseau?) as one last Russian mob “test” — a novel way to figure out if Scorpex is a snitch and wearing a wire.

Rating: TV-MA, drugs, smoking, profanity

Cast: Vincent Cassel, Laura Felpin, Mister V, Alexis Manenti, Nina Zem and Déborah Lukumuena

Credits: Directed by So-Me, scripted by So-Me, Elias Belkeddar and Baptiste Fillon. A Netflix release.

Running time: 1:31