Used for: Headlight Bulb High Beam, Daytime Running Light Bulb(Hatchback, with halogen headlights)
Used for: Headlight Bulb High Beam and Low Beam
Used for: Headlight Bulb Low Beam
Used for: Back Up Reverse Light Bulb
Used for: Brake Light Bulb, Tail Light Bulb
Used for: Parking Light Bulb
Used for: Parking Light Bulb
Used for: Parking Light Bulb(Hatchback, with halogen headlights)
Used for: Parking Light Bulb(Hatchback, with halogen headlights)
Used for: Side Marker Light Bulb Front
Used for: Side Marker Light Bulb Rear(Sedan)
Used for: Turn Signal Light Bulb Front(Compare to original - Option 1)
Used for: Turn Signal Light Bulb Front(Hatchback, Compare to original - Option 2)
Used for: Turn Signal Light Bulb Rear(Hatchback, Compare to original - Option 2)
Used for: Turn Signal Light Bulb Rear(Sedan, Compare to original - Option 1)
This 2018 Ford Focus bulb size page is designed to help you verify the correct bulb by lighting position, so you can match the right part before you buy. Because the Focus was offered in different body styles and lighting packages, the bulb list can change depending on whether you have a sedan or hatchback, halogen headlights or HID/LED equipment, and different trim-level options.
Use this guide as a quick reference for common exterior and interior lighting on the 2018 Ford Focus, including headlights, turn signals, brake lights, reverse lights, map lights, dome lights, and license plate lights. Checking the bulb location first makes replacement easier and helps avoid ordering the wrong size for your specific Focus setup.
Fitment on the 2018 Ford Focus can vary by market, trim, and factory lighting package, so always compare the bulb position on your car with the chart before purchasing. Halogen and LED-equipped models may use different bulbs in the same location, and some aftermarket LED conversions may require additional resistors or compatibility checks to prevent warnings or fast flash issues. If you are unsure, remove the installed bulb and confirm the number printed on the base before ordering a replacement.
The low beam bulb is listed as H11 for the 2018 Ford Focus. This applies to the standard low beam setup shown on the page.
The high beam bulb is H1 for the 2018 Ford Focus. Some vehicles may have different lighting packages, so check the exact headlight type on your car.
For hatchback models with HID headlights, the headlight bulb is listed as D3S for both high beam and low beam in the chart.
The front turn signal bulb is 7440A for one listed configuration. A hatchback compare-to-original option is also shown as 7507, so body style and original equipment matter.
The rear turn signal bulb for the sedan is 3157 in the chart. This is a common dual-function style on many Ford applications.
For the hatchback, the rear turn signal bulb is listed as 3757A under the compare-to-original option. Hatchback lighting can differ from sedan lighting.
The back up reverse light bulb is 921. This is the bulb size shown for the reverse light position on this page.
Both the brake light bulb and tail light bulb are listed as 3157R. That makes it easier to match the rear lamp functions on the 2018 Focus.
The license plate light bulb is LED on this page. Because it is listed as LED, the exact replacement may depend on the factory lamp assembly.
The dome light bulb is LED and the map light bulb is also LED. These interior positions are listed as LED on the chart rather than a traditional replaceable incandescent size.
The front side marker light bulb is 2827 for the 2018 Ford Focus. This is the bulb size shown in the chart for that position.
Check your body style, headlight package, and the exact bulb position first. The 2018 Focus can use different bulbs for sedan and hatchback models, and halogen, HID, and LED-equipped cars may not share the same fitment.
