2019 BMW X4 bulb fitment is LED throughout the supplied lighting data. The low-beam and high-beam headlights are both listed as LED, so this model-year fitment does not identify a separate replaceable halogen bulb size for either headlight function.
The fog lights, daytime running lights, parking lights, and both front and rear side markers are also listed as LED. Rear lighting uses LED for the tail lights, brake lights, center stop light, reverse lights, and rear turn signals. The license-plate and step lights are LED as well.
- Headlights: LED low beam and LED high beam
- Fog lights: LED
- Rear exterior lighting: LED tail, brake, center stop, reverse, and rear turn signal lights
- Interior lighting: LED dome, map, trunk, vanity, and other interior lights
No projector or non-projector headlight variation is specified in the supplied fitment data. Confirm the original lamp assembly and connector before ordering replacement parts, particularly when servicing integrated LED modules.