For the 2020 Mazda Mazda3, both the low-beam and high-beam headlights use LED lighting. The supplied fitment data does not list a replaceable halogen bulb number for either beam, so verify the headlamp assembly and replacement procedure before ordering parts.
The fog lights and front turn signals are also LED. Most rear and exterior lighting uses LED assemblies, including the reverse lights, brake lights, center stop light, tail lights, rear turn signals, rear side markers, and license plate lights.
One notable variation is in the parking light fitment: the data lists either bulb 2827 or an LED setup. The front side marker uses bulb 2827, while the interior dome and map lights are LED. The trunk light uses bulb 168. Check the existing socket and vehicle equipment before purchasing, particularly for the parking-light position where both 2827 and LED configurations are listed.