Upgrading the fog lights on a 2014 to 2017 Toyota Tundra sounds simple. Then you order the right bulb and discover it does not fit. We ran into this problem while testing Toyota Tundra fog light bulbs. The issue comes down to one confusing detail. Toyota labels these bulbs as H16, but they use a compact H11 style. In this guide, we cover every halogen, LED, and HID option we tested. We also explain why standard aftermarket H16 bulbs will not fit. Finally, we show you how to access the fog light housing. This makes swapping the bulb much easier.
The H16 vs H11 Confusion on the 2014-2017 Tundra
The first thing we noticed on the Tundra fog light housing was the plastic marking. It reads, “USA 12 Volt H16.” This marking tells you the housing is designed for an H16 bulb. Here is where things get confusing. Before this housing came out, this bulb shape was not called H16. In the aftermarket LED and HID world, H16 usually means a different bulb. It is also known as a 2504, 5202, or 9009. That bulb has large butterfly style mounting tabs.
Toyota decided to call this new H11 style bulb an H16, which has caused a lot of confusion. Truck owners search for an H16 bulb and find the wrong style. They often receive the large butterfly tab version instead. That bulb will not connect to the Tundra fog light housing. We confirmed the correct fitment during our testing. What you actually want is an H11 style bulb. The Tundra factory bulb is essentially a compact H11. It uses the same base and mounting design as an H11. However, it has a smaller glass tube and filament.
Because of this mislabeling, we strongly recommend cross-referencing before you buy anything. If you want a full rundown of what fits everywhere on this platform, we put together a complete bulb guide for the 2015 Tundra that clears up the fog light size question and covers the rest of the truck too.
The Easy Halogen Upgrade: Vision X H11
If you want the cheapest, most straightforward brightness bump, a halogen H11 is the answer. We tested a set of Vision X halogen H11 bulbs alongside the stock H16, and the construction is nearly identical to the OSRAM H16 that sits in the Tundra fog light. The difference is in the numbers. The stock H16 is rated at 19 watts, while the Vision X H11 is rated at 55 watts. Wattage references how much power the bulb consumes to operate, so more watts means more brightness but also more heat inside the housing. That is the tradeoff to be aware of.
Even though the two bulbs look almost identical, the three mounting prongs are slightly different. That difference is intentional. Toyota designed the housing to prevent a standard H11 from fitting directly. The H16 slides in and locks into place with no fuss. The H11 takes a little more work to install. We found it easier to line up two prongs first. You can also start with the larger prong. Then, work the bulb into the locking position. It can be difficult to do this inside the truck. We recommend removing the fog light housing first. That is exactly why we pulled ours for the demonstration.
If you want the bolt-in halogen route, the 2014-2017 Tundra halogen fog light bulb kit is the closest match to stock while giving you noticeably more output.
Affordable LED Accent: GTR Lighting 16 LED H11
Moving up to LED, the first product we want to highlight is the GTR Lighting 16 LED H11 bulb, part number 70102-64. Its three tabs are laid out very similarly to the stock bulb, so it goes in the same general way. LED bulbs like this are built a little more universal, so it is more forgiving than the halogen H11 and easier to seat, though still not a perfect drop-in since it is an H11 going into an H16 housing.
The reason to pick this over a full LED conversion kit is cost. This bulb turns your fog lights into more of an accent. It looks nice, it carries an aftermarket HID-style color, but it is not going to throw tons and tons of light. If you already run an HID conversion in your headlights but do not want the expense or heat of an HID kit in the fogs, this bulb matches that HID color at a fraction of the price. There is no ballast, nothing extra to mount. You pull the old bulb and put the new one in. It gives you that LED or HID look without spending a ton of money.
Our Top LED Pick: GTR Lighting Second-Generation Bulb
The LED product we recommend most for the Tundra fog lights is the GTR Lighting second-generation LED headlight bulb. It is a conversion kit, but it is an all-in-one design that behaves like a simple replacement bulb. There are no extra parts to mount, no ballasts, and no separate driver. It is genuinely plug and play, and it uses the same mounting collar style as the original H16 bulb with the correct connector.
The standout feature is color choice. This was the first LED conversion kit on the market where you get to pick your light color using swappable color shields. On top of the bulb is a thumb screw with the GTR logo. You twist it off and slide a sleeve over the light. With no shield, the bulb runs 5000K. Add the gold shield for 3000K, the OEM-white shield for 4300K, the white filter for 6000K, the light blue filter for 8000K, and the last shield takes it up to 10000K. That range (3000K, 4300K, 5000K, 6000K, 8000K, and 10000K) lets you customize your fog light color to match your headlights or a show look.
The construction uses four 5 watt Cree LEDs per side surrounded by a silver reflector, with the tower acting as the heat sink and a high-power waterproof fan built into the base. It is compact for a conversion kit and mounts very easily, with even less hassle than the smaller LED bulb. Everyone we have set up with these loves the output and especially the hot-swappable color option. It is bright, it is easy, and it is our preferred choice over an HID kit for the fog lights.
If you are exploring other premium LED fog options, we also like the XD Xtreme H11 LED Pro fog light bulbs, and you can find the Xtreme LED Pro fog bulbs from The Retrofit Source as well. Another strong H11 LED contender worth comparing is the Morimoto 2Stroke 4.0 H11 LED bulbs.
Maximum Brightness: GTR 35 Watt 6000K H11 HID Kit
The final option is the 35 watt 6000K H11 HID conversion kit from GTR Lighting. Until the newer LED conversion kits arrived, this was really the only product on the market brighter than stock. HID remains king of the hill for raw output. You get more light, a more focused beam pattern, and a range of color choices you select ahead of time. Each kit comes with one bulb and one ballast per side, and that ballast is the main drawback since it has to be mounted somewhere.
The beam pattern is the big reason HID still shines here. LED conversion kits have historically struggled with scatter. A truck can look bright from the front, but from the driver’s seat the light is spread out. HID produces a more focused beam pattern. You still get some glare, but it is not as bad as most LED conversions. The GTR bulbs are extremely high quality too. If you have only ever used cheap kits in the $35 to $100 range, these will surprise you with better color, higher brightness, higher quality ballasts, and a lower failure rate.
Installation is the sticking point. The GTR HID bulb looks similar to the stock H16, but the tabs are large and beefy, so you really have to fight it in. We even used a set of pliers to seat it. The adapter harness has two wires that connect to the ballast power output, two that connect to the ballast power input, and one that plugs into your factory wiring like the stock bulb. Power it up and you get that familiar HID flash, and it makes far more light than the halogen or the accent LED. The other downside is removal, which is even harder than installation because of how tight the fit is. It can be done by wiggling it back and forth with pliers, but it is not as easy as the LED bulbs. If you want to go this route, the H11 XTR HID fog light conversion kit is the type of high-quality kit we trust.
How to Access and Replace the Tundra Fog Light Bulb
Because all of these bulbs take some finesse to seat, gaining good access is half the battle. Here is the process we used.
Step 1: Remove the Three 10mm Bumper Liner Bolts
Accessing the fog light bulb starts with removing three 10mm bolts from the bumper liner. Once those bolts are out, you can pull the liner back far enough to reach behind the fog light housing.
Step 2: Unplug the Connector and Twist Out the Bulb
With the liner loose, you can reach the fog light wire connector, unplug it, and then twist out the bulb. Swapping halogen or the GTR LED bulbs is manageable here, though seating an H11-style bulb into the H16 housing takes some convincing. For the HID kit, you also need a place to mount the ballast, which makes it the hardest option to install and remove.
Which Tundra Fog Light Bulb Should You Choose?
If your goal is a cheap brightness bump, the Vision X halogen H11 is the simplest step up from the 19 watt stock bulb. If you want an inexpensive LED accent with an HID-style color, the GTR 16 LED H11 is a great value. For the best mix of easy installation, brightness, and color flexibility, the GTR second-generation LED bulb is our top pick for fog lights. And if you want the absolute brightest output with the most focused beam pattern and do not mind mounting a ballast, the 35 watt 6000K H11 HID kit delivers, just know it is the hardest to install and remove.
Frequently Asked Questions
What bulb size do 2014-2017 Tundra fog lights actually use?
They use an H11-style bulb that Toyota labels as H16, which is different from the common aftermarket H16 (also known as 2504, 5202, or 9009) found in other vehicles.
Can I put a standard aftermarket H16 LED bulb in my Tundra fog light?
No. A standard aftermarket H16 bulb has large butterfly-style mounting tabs and will not connect to the Tundra fog light housing at all.
What is the easiest halogen upgrade for Tundra fog lights?
The Vision X H11 halogen bulb is a nearly identical fit to the stock H16 but rated at 55 watts versus the stock 19 watts, giving noticeably more brightness at the cost of more heat.
What is the top recommended LED option for Tundra fog lights?
The GTR Lighting second-generation LED headlight bulb, an all-in-one plug and play kit with no ballast, that includes swappable color shields for 3000K, 4300K, 5000K, 6000K, 8000K, and 10000K output.
Should I choose HID or LED for my Tundra fog lights?
The GTR second-gen LED bulb is recommended for fog lights due to easy installation and color flexibility, while the 35 watt 6000K H11 HID conversion kit from GTR Lighting offers the brightest output and most focused beam but requires mounting a ballast and is harder to install and remove.
Meet the Experts Behind Headlight Revolution
Chris Nelson – Founder
Before founding Headlight Revolution in 2011, Chris worked as an automotive install technician specializing in lighting, sound systems, and engine performance parts. He has personally tested thousands of lighting products and works directly with lighting engineers to evaluate the technical performance behind every recommendation.
Josh Beberg – Content Production Manager
Josh leads hands-on testing and content production at Headlight Revolution. From beam pattern comparisons to real-world installations, he works directly with lighting engineers to ensure every review is grounded in measured results, not marketing specs.
