2020 Mazda3 Light Bulbs Types:
| Bulb | Type | Output |
| Interior Lights: | ||
| Overhead lights (Front)/Map lights | LED | - |
| Overhead light (Rear) | LED | - |
| Vanity mirror lights | LED | - |
| Trunk light (4-Door) | - | 5W |
| Luggage compartment light (5-Door) | LED | - |
| Exterior Lights: | ||
| Headlights | LED | - |
| Daytime running lights | LED | - |
| Parking lights LED type | LED | - |
| Parking lights Bulb type | WY5W | 5W |
| Front turn signal lights | LED | - |
| Front side-marker lights LED type | LED | - |
| Front side-marker lights Bulb type | WY5W | 5W |
| Side turn signal lights | LED | - |
| High-mount brake light | LED | - |
| Rear turn signal lights | LED | - |
| Rear side-marker lights | LED | - |
| Brake lights | LED | - |
| Taillights | LED | - |
| Reverse lights | LED | - |
| License plate lights | LED | - |
