Adding a brz fourth brake light is basically a rite of passage for most owners these days. If you've spent any time looking at the back of your car, you've probably noticed that awkward plastic placeholder sitting right in the middle of the rear diffuser. It looks like something is missing because, well, something is missing. In other markets, that spot actually does something, but for those of us in North America, we just get a blank plastic plug that screams "entry-level trim" even if you're driving a Limited model.
Filling that gap isn't just about making the rear end look finished, though that's a huge part of it. It's about adding a bit of personality and, honestly, a lot of extra safety. When you're driving a car as low as the BRZ, you want as much light as possible hitting the eyes of the person in the giant SUV behind you.
Why the Rear Looks Incomplete Without It
The first time I really looked at the back of a stock BRZ, I couldn't unsee that empty triangle at the bottom. It's such a deliberate design choice that feels like it was cut at the last second to save a few bucks on the assembly line. It leaves the back of the car feeling a bit bottom-heavy and unbalanced. By installing a brz fourth brake light, you're essentially completing the silhouette that the designers intended.
It's one of those mods that looks like it should have been there from the factory. Most people who aren't "car people" won't even realize you modified anything; they'll just think your car looks a bit sharper than the one next to it. It ties the whole rear aesthetic together, especially if you've already upgraded your main tail lights to something more aggressive.
Choosing the Right Style for Your Build
When you start shopping for a brz fourth brake light, you're going to realize pretty quickly that there are a ton of options. You've got the classic red lens that keeps things looking OEM-plus, or you can go for a smoked lens if you're doing the whole "murdered out" look. Personally, I think the clear or white lenses look great on the World Rally Blue or Silver cars, but it really comes down to what you're doing with the rest of your lighting.
Then there's the light pattern itself. Some are just a solid block of LEDs, while others have a "V-shaped" or "bar" design that mimics the newer style of tail lights. If you have the second-generation BRZ, you might want something that flows with those sharper lines. If you're in a first-gen, the classic triangular F1-style light usually looks the best.
The F1 Flash Feature: Cool or Annoying?
This is where the community gets a bit divided. A lot of these lights come with what people call the "F1 strobe" or "hyper-flash" feature. Basically, when you hit the brakes, the fourth light flashes rapidly a few times before staying solid. The idea is to grab the attention of the driver behind you immediately.
From a safety perspective, it's brilliant. It's hard to ignore a flashing red light in your field of vision. However, some people find it a bit "extra" for daily driving. If you're sitting in stop-and-go traffic and the guy behind you has to watch you strobe every five seconds, they might get a little annoyed. The good news is that most high-quality brz fourth brake light kits have a way to toggle this on or off. Usually, it's just a matter of connecting or disconnecting a specific wire during the install.
Let's Talk About the Installation Process
I know "wiring" is a scary word for some people, but honestly, this is one of the easier projects you can tackle on a Saturday afternoon. Most modern kits are almost entirely plug-and-play. You don't usually have to go around cutting into your factory harness anymore, which is a huge relief for anyone worried about their warranty or making a mess of the electronics.
Usually, the process involves popping out that plastic cover (which can be a bit stubborn, so don't be afraid to use a little muscle), mounting the new light housing, and then running the wires up into the trunk area. You'll typically use a Y-harness that plugs directly into your existing tail light connector. It's pretty straightforward, though you might end up with some dirty hands from reaching behind the bumper.
Quick tip: If you're doing this on your driveway, just make sure you have some zip ties handy. You don't want those extra wires dangling down near the exhaust or flapping around while you're hitting the canyons.
Visibility and Safety Perks
We already touched on this, but it's worth repeating: the BRZ is a tiny car. In a world full of lifted trucks and massive crossovers, being seen is a genuine safety concern. Having that extra light source low down and centered provides a clear point of reference for other drivers.
Beyond just the braking aspect, many brz fourth brake light units also act as a running light and even a reverse light. If your kit includes the reverse light function, it's a massive upgrade. The stock reverse lights on the BRZ are fine, I guess? But they aren't exactly floodlights. Having a bright white LED blast out from the center of the bumper makes backing into a dark garage or a tight parking spot way easier.
Potential Legal Headaches
Before you go all out, it's worth checking your local laws. In most places, a solid fourth brake light is perfectly fine. However, that F1 flashing feature we talked about can be a bit of a gray area. Some states or provinces have strict rules about flashing red lights (usually reserving them for emergency vehicles).
I've rarely heard of anyone actually getting a ticket for it, but if you live in an area where the police are particularly bored or strict about car mods, you might want to keep the strobe feature turned off. To be honest, even without the flash, the brz fourth brake light does plenty of work just by being an extra bright source of light when you're slowing down.
Is It Worth the Money?
You can find these lights at a bunch of different price points. You've got the "no-name" versions on auction sites for cheap, and then you've got the high-end brands like Valenti or OLM that cost a bit more. My advice? Don't cheap out too much.
The cheaper ones often have issues with moisture buildup. There's nothing that ruins the look of a clean car faster than a "waterfall" of condensation trapped inside your light housing. Spending an extra fifty bucks for a unit with better seals and higher-quality LEDs is almost always worth it in the long run. Plus, the better brands usually have much clearer instructions and better-fitting harnesses.
Wrapping Things Up
At the end of the day, your car should reflect your style. But for most of us, the brz fourth brake light is just one of those "must-have" items. It fixes a glaring omission from the factory, adds a layer of safety that's actually useful, and gives you a chance to get your hands a little dirty in the garage without needing a mechanical engineering degree.
Whether you go for the flashy F1 style or a subtle red glow that looks factory-fresh, you'll probably find yourself looking back at your car every time you park it. And really, isn't that why we buy these cars in the first place? It's those little details that turn a great car into your car. So, if you're still staring at that plastic plug in your bumper, do yourself a favor and get it swapped out. You won't regret it.