2019 Toyota Tacoma — Bulb Sizes (Headlight, Tail, Fog)

Quick reference

Notes:

• 2019 Tacoma headlamps are halogen projectors across trims; factory LED headlamps arrived for 2020+. No factory HID.
• TRD Pro uses an OEM LED fog lamp assembly; it is a sealed module, not a replaceable H16 bulb. Other trims use H16 bulbs.
• Rear lamp layouts can vary by market/trim. The most common setup uses 7443 dual‑filament for stop/tail and a separate 7440 for rear turn. Some trucks combine stop/turn on a single 7443. Verify your housing before ordering.

LED vs halogen upgrade considerations

• Headlights (H11/9005): Drop‑in LED replacements are popular, but the Tacoma’s DRL runs the 9005 high beam at reduced voltage. Many generic LED 9005 bulbs will flicker or not illuminate in DRL mode. Choose DRL‑compatible LED 9005s with low‑voltage drivers or use an anti‑flicker/canbus harness. The 2019 Tacoma typically doesn’t throw headlight bulb‑out warnings, so CANBUS decoders are usually not required for low/high beams.
• Fog lights: If you have halogen H16 fogs, LED H16 bulbs upgrade cleanly. TRD Pro owners must replace the entire LED fog module if it fails or to change color/brand.
• Turn signals: Switching 7444NA/7440 to LED will cause hyper‑flash. The 2019 Tacoma uses the body ECU for flasher control, so you generally need load resistors (approx. 6Ω, 50W) wired in parallel at each turn bulb. There isn’t a simple plug‑in flasher relay swap on this generation.
• Tail/brake: For 7443 LED upgrades, match polarity (Toyota is typically standard, not CK, but verify with a test light) and choose bulbs with true dual‑intensity.
• Interior/License: 194/168 and DE3175 LED swaps are straightforward and error‑free. Pick warm white (3000–4300K) if you prefer an OEM look; cool white (6000K) is brighter but harsher.

How to replace each bulb

• Low beam (H11): Open hood, turn the headlamp dust cap counter‑clockwise, unplug the H11 connector, rotate the bulb 1/4 turn and remove. Avoid touching the glass; seat the new bulb fully and reinstall the cap.
• High beam/DRL (9005): Access from the rear of the housing; rotate the 9005 counter‑clockwise. If upgrading to LED, confirm clearance for the heat sink and secure any driver box inside the cap.
• Fog light (H16): Turn the wheel outward, remove a few clips from the fender liner, reach in behind the fog housing, twist the H16 to remove. TRD Pro: service the entire LED fog assembly from the front with the bezel removed.
• Front turn (7444NA) and front side marker (194): Access through the fender liner; twist the socket out of the headlamp housing, swap the bulb, and lock back in.
• Tail/Brake/Rear turn (7443/7440): Lower the tailgate, remove the two 10mm bolts holding the tail lamp, pull the assembly straight back to release pins. Rotate the appropriate socket(s), replace bulbs, and reverse to install. If your truck combines stop/turn on one 7443, note which socket is dual‑filament.
• Reverse (921): With the tail lamp out, twist the lower socket and replace the 921 bulb.
• License plate (194): From the underside of the tailgate garnish or bumper (depending on cab/bed setup), twist the small socket and replace the 194.
• Interior map (194): Gently pry the clear lens, pull the wedge bulb straight out, and insert the new one. Test before snapping the lens back on.
• Interior dome (DE3175): Pry the lens at the notch, release the spring clips, swap the 31mm festoon. Observe polarity on LEDs—flip if it doesn’t light.

Common lighting issues for this generation

• DRL flicker after LED high‑beam upgrade: Use DRL‑compatible 9005 LEDs or add anti‑flicker modules.
• Hyper‑flash with LED turn signals: Install appropriate load resistors at each corner or reconfigure with a quality module designed for the Tacoma’s BCM.
• Moisture/condensation in headlamps or tail lamps: Light fogging can be normal; persistent pooling suggests a compromised seal—reseal or replace the housing.
• Premature H11 failures or melted connectors: Avoid over‑wattage halogen bulbs; use dielectric grease sparingly and ensure the dust cap is seated to control heat and moisture.
• Corrosion in license plate and tail lamp sockets: Common on trucks—apply dielectric grease and ensure gaskets are intact.

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