For the 2021 Toyota Tacoma, the low-beam headlight uses an H11 bulb, while the high beam uses an H9 bulb. Check the existing bulb and socket before ordering, especially if replacing a complete headlight assembly or servicing a non-original lamp.
Fog-light fitment varies: the supplied data lists both H11 and H16, so confirm the bulb currently installed in your Tacoma’s fog-light housing. Front turn signals may use 7440 or amber 7442NA bulbs. Daytime running lights are listed as either 7442NA or an integrated LED setup, making this another area to verify before purchase.
Additional exterior fitments include a 7443 bulb for the brake, tail, rear turn-signal, and rear side-marker lights. The center stop light and license-plate light use 168 bulbs, which are also listed for the front side markers and map lights. Interior applications include DE3175 for the dome light and 7065 for the vanity light.