The vents on your car breathe nothing — and the buyer is starting to notice

The most aggressive-looking surfaces on a modern performance car — the fender gills, the hood scoops, the quad outlets, the slashes in the bumper — are, in a growing number of cases, sealed plastic over solid sheet metal. They move no air, cool nothing, and exist purely to read fast in a photograph. As of late 2025 the enthusiast press is naming the cars by model year, and the design decision that was supposed to signal performance is now the thing that gets a car mocked the moment its cover is blown.

The contested surface here is the functional aperture — the vent, the intake, the scoop, the grille — the part of a car's face and flanks whose entire visual job is to say this thing breathes, this thing is fast, this thing needs the air it appears to be taking in. For a century those openings were the most honest features on a car: a hole in the bodywork existed because something behind it needed air. That covenant is now routinely broken. The opening is drawn first, for the look, and the airflow — if there ever was any — is engineered somewhere else entirely. The render shows the slash, the gill, the scoop, catching a hard shadow in three-quarter profile. It cannot show that the slash is capped, that the gill backs onto a doorjamb, that the scoop is a moulding. The most performance-coded square inches on the car are increasingly the least functional, and the audience that the car is sold to is exactly the audience that finds out.

The press is now naming the cars by model year

In December 2025 CarBuzz ran down "the worst fake vents on modern performance cars," and the list is not a fringe of obscure trims — it is a roll call of cars sold on the promise of being driver's cars: the 2001–2006 BMW M3 front fender vents, the 2008–2014 Lexus IS F rear-arch vents, the 2017–2021 Honda Civic Type R's "360-degree" decoration, the 2018–2023 Kia Stinger, the 2020–2024 Toyota Camry TRD, the 2022–present Subaru BRZ, and — the most-cited offender of all — the 2020–2026 Toyota Supra (CarBuzz, 10 Dec 2025). The author's verdict is the whole problem in one line: fake ducts "might look cool to someone who doesn't know they're non-functional, but as soon as your cover is blown, the cool-factor of any given car drops significantly" (CarBuzz, 10 Dec 2025). The decision is self-defeating with its own target customer: the more an enthusiast knows, the worse the car looks.

The Supra is the case study — including the part where the engineer's explanation didn't survive contact

The fifth-generation Supra wears fake vents almost everywhere: in the bumpers, beside the front lights, on the front fenders, on the doors, and beside the rear lights. When pressed, the A90's chief engineer Tetsuya Tada offered the standard defence — that the holes were there, just capped: "If you look at the vehicle today, there's holes all over the body. They're just capped on the production car," and they could be "removed very easily" for racing (Jalopnik, Jason Torchinsky, 17 Jan 2019). Inspection did not bear it out: behind the plastic covers was solid sheet metal, and most of the openings — the door vents that back onto the doorjamb — could serve no aerodynamic purpose even if cut through; Toyota's own follow-up conceded only that "some vents could likely be altered" (Jalopnik, 17 Jan 2019). The 2020–2026 Supra ends production after the 2026 model year — meaning the most-decorated set of fake vents of its era is closing out exactly as the trade press turns the practice into a punchline.

The cruelty is that the real version works — and the numbers are huge

The reason fake vents sting is that functional aperture management is one of the highest-leverage tools an aerodynamicist actually has. At highway speed, roughly 60% of a vehicle's energy goes to overcoming aerodynamic drag, and the front intake is a major contributor: air that goes into a grille and isn't perfectly managed becomes drag. That is why active grille shutters — vanes that physically close the intake when the engine doesn't need cooling air — have spread across the industry: closing the intake can cut the drag coefficient by roughly 6–8% in the closed position, worth a few percent in real-world fuel economy (Edmunds — "Active Grille Shutters Are Latest Way To Improve Fuel Efficiency"). A real opening, opened and closed at the right moment, is measurable money and range. A fake one is the opposite: it implies airflow management while delivering a moulding. The decision to fake it doesn't just fail to add the benefit — it spends the visual language of efficiency on a part that has none.

The EV makes the lie structural — there's nothing left to cool

Electrification removes the last excuse. An EV has no radiator demanding a metre of frontal intake; its motors and battery need cooling, but far less of it and rarely behind the traditional grille. The honest EV face is closed. Yet manufacturers keep drawing the grille anyway, because the brand's recognition cue lives there — Jalopnik called the retained EV grille "an ornament that suggests something that's no longer there" (Jalopnik, Jason Torchinsky, 29 Nov 2012). The 2025 Kia EV6 update narrows its grille to a slit; BYD's Ocean-aesthetic models pair a closed front fascia with a decorative lower trapezoid; BMW's kidneys persist on electric cars as pure signature. The EV-era debate isn't whether the grille cools anything — everyone agrees it doesn't — it's whether a brand can keep wearing the shape of a function it no longer performs, and for how long before the buyer reads it as costume.

The split the studio never reconciles

Underneath the mockery is a real organisational gap, and it is the recurring one. Four parties touch a vent and none of them sees the same object. The designer sees a shadow line that makes the car look fast and breaks up a slab of bumper. The aerodynamicist sees a hole that, done right, is worth real drag and, done wrong, is worth real drag the other way. The cost engineer sees a moulded blank as cheaper than a routed duct and a separately-positioned real intake — and notes, correctly, that decoupling the two lets each team put its element where it wants (CarBuzz, 10 Dec 2025). And the buyer — never in any of those rooms — sees an aggressive, functional-looking face, pays the performance premium, and then reads a forum thread explaining that the gills are glued-on plastic. The brochure photo and the owner's eventual knowledge are two different products, and the studio signs off only the first one.

The render shows the one state that hides the lie

This is the trap. A car's most important sign-off tool is the photoreal hero still — and a still cannot show that an opening is sealed. In hard three-quarter light a real intake and a moulded blank read identically; the shadow falls the same way, the slash looks just as fast. The property the whole controversy turns on — does this thing actually move air — is structurally invisible in the exact artefact the decision is made from. So the fake vent sails through the review looking exactly like the function it's imitating, the bumper gets tooled, and the truth only surfaces later, in the place the studio can't see: a buyer's hand on a panel that doesn't open, a journalist's caption, a resale conversation. The decision was made in the one state — beautiful, frozen, photographed — that conceals the thing it should have surfaced.

Where the decision goes wrong — and what we do about it

The mistake is treating an aperture as a shadow line, when it is simultaneously an aerodynamic part, a cost part, a brand-honesty part, and a promise to a customer who can check. The render says "fast and functional." The doorjamb behind the gill says "moulding." The forum says "fake." The resale buyer says "I read about these."

This is the gap DEPIX Design Intelligence exists to close. Not to draw the gill or route the duct — to put the call (is this opening real, where does the air actually go, and what does the face look like if we commit to honesty instead of theatre) in front of the design chief as photoreal evidence in the states the hero render structurally hides: the proposed face shown with its openings real and load-bearing versus sealed and decorative, side by side; the honest closed EV fascia rendered against the costume grille so leadership decides the brand-signature trade with its eyes open; the performance face shown as a knowing buyer will photograph and dissect it — from a foot away, at the panel that does or doesn't open — not only as a launch-day beauty shot. Side by side, at decision time, while the bumper is still a surface in CAS and the tooling is still unordered — not after a December round-up names your car on the worst-of list.

The point of design intelligence is to use the intelligence of AI to make the better decision before the moulding is tooled, the premium is charged, and the cover gets blown. Draw the aggressive face — of course. Then render the version that breathes and the version that only pretends to, with the airflow truth attached, and decide which one the brand can stand behind when the most knowledgeable buyer in the room turns the car around in their hands. The photoreal output is the evidence. The decision is the product.

Sources

• ●CarBuzz — "The Worst Fake Vents On Modern Performance Cars" (Sean McManus; names 2020–2026 Toyota Supra, 2017–2021 Honda Civic Type R, 2018–2023 Kia Stinger, 2008–2014 Lexus IS F, 2001–2006 BMW M3, Subaru BRZ, Camry TRD et al.; "as soon as your cover is blown, the cool-factor… drops significantly"; the designer/engineer-decoupling cost rationale), 10 Dec 2025 — https://carbuzz.com/worst-fake-vents-on-modern-performance-cars/
• ●Jalopnik — "I Just Don't Believe What The Toyota Supra's Chief Engineer Says About The Fake Vents" (Jason Torchinsky; Tetsuya Tada "there's holes all over the body. They're just capped on the production car"; inspection found solid sheet metal behind covers; Toyota conceded only "some vents could likely be altered"), 17 Jan 2019 — https://www.jalopnik.com/i-just-dont-believe-what-the-toyota-supras-chief-engine-1831838527/
• ●Jalopnik — "Why Do All These Electric Cars Have Grilles?" (Jason Torchinsky; EVs need no radiator-scale intake; the retained EV grille "an ornament that suggests something that's no longer there"; tradition / brand identity / conversion practicality as the reasons it persists), 29 Nov 2012 — https://www.jalopnik.com/why-do-all-these-electric-cars-have-grilles-5964070/
• ●Edmunds — "Active Grille Shutters Are Latest Way To Improve Fuel Efficiency" (functional active grille shutters close the intake to cut drag; aerodynamic drag is the dominant energy cost at highway speed; closing the intake yields a measurable drag-coefficient reduction and fuel-economy gain) — https://www.edmunds.com/car-news/active-grille-shutters-are-latest-way-to-improve-fuel-efficiency.html
• ●AutoIndustriya — "WTH is up with these fake air vents?" (feature on the spread of non-functional vents across price brackets and the enthusiast backlash to decorative aero) — https://www.autoindustriya.com/features/wth-is-up-with-these-fake-air-vents.html