2018 Ford Focus Light Bulbs Types:
| Bulb | Type |
| Headlamps high beam (Halogen) | H1LL |
| Headlamps high beam (HID) | D3S |
| Headlamp low beam (Halogen) | H11LL |
| Headlamp low beam (HID) | D3S |
| Daytime running lamps | H1LL |
| Daytime running lamps (High series) | LED |
| Park lamp - front | 193 |
| Park lamp - front (High series) | LED |
| Direction indicator - front | WY21W |
| Direction indicator - front (High series) | PY21W |
| Fog lamps | H8 |
| Sidemarker - front | WY5W |
| Direction indicator - rear (4-door) | P27/7W |
| Direction indicator - rear (5-door) | 3757 NAK |
| Rear and brake lamps | P27/7W |
| Rear lamps (4-door) | 194 |
| Rear lamp (5-door high series) | LED |
| Sidemarker - rear (5-door) | 194 |
| Sidemarker - rear (High series) | LED |
| Backup lamp | 921 |
| License plate lamp | LED |
| High-mount brake lamp | LED |
| Interior lamps | LED |
