For the 1999 Nissan Frontier, the low-beam and high-beam headlights both use a 9004 bulb. The supplied fitment data does not indicate a separate bulb for low- or high-beam operation, nor does it list a projector or non-projector headlight variation.
The front fog lights use 64146BC bulbs. For exterior signal and marker lighting, the front turn signals take 1156A, while the front side markers use 168NA. The reverse lights use 3156 bulbs.
- Brake and tail lights: 3157R
- Rear turn signals: 3157
- Center stop light: 2723
- License plate and parking lights: 168 or 917
- Courtesy light: DE3175
- Map light: 578
Check the existing bulb and socket before ordering where more than one listed size applies, particularly for the license plate and parking light locations.