2019 Toyota Tundra Bulb Size Guide

Quick reference

The 2019 Toyota Tundra offers a robust and reliable lighting system, though the specific bulb types and sizes can vary significantly based on the trim level and original equipment. Understanding these differences is crucial for any potential upgrades or replacements.

For many Tundra owners, the SR, SR5, and Limited trims likely came equipped with traditional halogen headlights and fog lights. These models utilize an H11 bulb for the low beam and a 9005 bulb for the high beam. The fog lights, if present, typically use an H16 bulb. These are common halogen sizes, making replacements and aftermarket upgrades relatively straightforward.

However, higher trim levels such as the Platinum, 1794 Edition, and TRD Pro often feature factory-installed LED headlights and fog lights. It's important to note that for these OEM LED systems, the LEDs are typically integrated into the headlight assembly and are not designed to be individually replaced. If an LED element fails in such a system, the entire headlight assembly often needs to be replaced, which can be a more significant undertaking and expense.

Daytime Running Lights (DRLs) on the 2019 Tundra can also see variation. Some trims use a 7440 incandescent bulb, while others have LED DRLs integrated into the main headlight assembly. Front turn signals are generally 7440A (amber) incandescent bulbs, while the rear turn signals are 7440 incandescent. Brake lights and tail lights commonly share the 7443 incandescent bulb. Reverse lights typically use a 921 bulb, and license plate lights are often 168 incandescent bulbs.

Inside the cabin, the dome light commonly uses a DE3175 festoon bulb, and the map lights often take a 168 bulb. Front and rear side marker lights generally utilize a 194 incandescent bulb.

LED vs halogen upgrade considerations

Upgrading from halogen to LED bulbs in your 2019 Toyota Tundra can offer significant improvements in brightness, lifespan, and energy efficiency. However, there are several important considerations to keep in mind.

CANBUS Errors: Many modern vehicles, including the Tundra, utilize a CANBUS (Controller Area Network Bus) system to monitor electrical components. When you replace a halogen bulb with an LED, the LED's lower power draw can sometimes trigger a "bulb out" warning on your dashboard, as the CANBUS system interprets the lower resistance as a burnt-out bulb. To prevent this, "CANBUS-ready" LED bulbs or external load resistors are often required. Load resistors simulate the electrical load of a halogen bulb, tricking the CANBUS system into thinking everything is normal. Without them, you might experience hyper flashing (fast blinking) for turn signals or persistent dashboard warnings.

Adapters Needed: While many aftermarket LED bulbs are designed for direct plug-and-play replacement, some applications, particularly for headlights, may require minor modifications or adapters to ensure a proper fit and beam pattern. Always ensure the LED bulb is compatible with your Tundra's specific housing to avoid poor light dispersion or blinding oncoming traffic. For projector-style halogen housings, ensure the LED replacement is designed for projector use to maintain an effective beam pattern.

Heat Dissipation: LEDs generate heat, albeit differently than halogens. High-quality LED bulbs often incorporate heat sinks or small fans to manage this. Ensure there