The size of a bulb is the most essential aspect that determines the safety and performance of your Ford Focus. The size of your Ford Focus bulb will also vary due to differences in size across different years and varying usage.  This headlight speaks will talk in detail about the bulb sizes of the 2015-2018 Ford Focus (the headlights, fog lights, brake lights, turn signals, and taillights) to assist the owners of the 2 0 1 5 , 2 0 1 6 , 2 0 1 7, a n d 2 0 1 8 Ford Focus to easily determine the bulbs they want and make smart decisions. 2015-2018 Ford Focus Sedan Headlight & Fog Light Bulb Sizes Light Type Bulb Size High Beam Headlight bulb H1 Low Beam Headlight Bulb H11/H9/H8 Fog Light H11/H9/H8 Note: The high beam headlight bulb size for the 2 0 1 5 , 2 0 1 6 , 2 0 1 7, a n d 2 0 1 8 Ford Focus Sedan is H1, while the low beam headlight bulb size is H11. Both are single-beam bulbs, but they are not the same and therefore are not interchangeable.   2015-2018 Ford Focus Hatchback Headlight & Fog Light Bulb Sizes Light Type Bulb Size Headlights (High Beam and Low Beam)(w/ HID Headlamps) H13/9008 High Beam Headlight bulb H1 Low Beam Headlight Bulb H11/H9/H8 Fog Light H11/H9/H8 N o t e : The headlights of the 2 0 1 5 , 2 0 1 6 , 2 0 1 7, a n d 2 0 1 8 Ford Focus Hatchback come in two types: one with HID headlights and the other with standard headlights. If your Focus Hatchback has HID headlights, the bulb size is H13, which is a dual-beam bulb. Conversely, if it has standard headlights, the low beam bulb size is H11, and the high beam bulb size is H1. 2015-2018 Ford Focus Turn Signal & Brake Light Bulb Sizes Light Type Bulb Size Turn Signal Light (Front) 7443/7440 Turn Signal Light (Rear) 3157/3156 Brake Light 3157/3156 Back-Up Light T15/912/921 Parking Light T10/194/168 Daytime Running Light H1 2015-2018 Ford Focus Other Bulb Sizes Light Type Bulb Size Side Marker Light (Rear) T10/194/168 Trunk Light T10/194/168 Tail Light 3157/3156 Door Mirror Illumination Light T10/194/168 Glove Box Light (2016-2018) T10/194/168 Upgrade Your 2015-2018 Focus Light Bulbs Are you sick of the boring, sulfur-hued light of halogen bulbs? Maybe it is time to stop using your Ford Focus halogen bulbs and migrate to LED headlight bulbs. As a matter of fact, lots of Focus owners have already made the switch, and they have found it a very wise decision. The LED bulb of the 2015-2018 Ford Focus currently in the market is much brighter and lasts much longer when compared to halogens. It implies a safer and more vigilant driving experience without having to frequently change the bulbs.  The question of where to find the finest LED bulbs resonates in the mind. At RIMTHIN , our specialty is high-quality LED headlight bulbs that perfectly fit the 2015-2018 Focus, and what our customers think and say about our products attests to them as being 5-star products. Please come and see us at RIMTHIN today. We believe we can help you come up with the best decision on your truck. Can not find the bulb you need? Use our bulb finder tool —it'll help you find it fast. FAQ What are the 2015-2018 Ford Focus headlight bulb sizes? The headlights of the 2015-2018 Ford Focus come in two types: one with HID headlights and the other with standard headlights. If your Focus has HID headlights, the bulb size is H13, which is a dual-beam bulb that functions as both low beam and high beam. Conversely, if it has standard headlights, the low beam bulb size is H11, and the high beam bulb size is H1. What is the 2015-2018 Ford Focus Back-Up Light b u l b size? The sizes of the 2015-2018 Ford Focus Back-Up Light bulb s are typically T15/912/921 . What is the 2015-2018 Ford Focus tail light bulb size? The sizes of 2015-2018 Ford Focus tail light bulbs are generally 3156/3157. Can I find the information about the 2015-2018 Ford Focus bulb sizes in this guide? Yes, this guide applies to the 2015-2018 Ford Focus. Can I replace my 2015-2018 Focus original headlights with LEDs? Yes, the general model of the 2015-2018 Focus can have an LED upgrade. Simply ensure that you get the right type of bulbs that suit your car. Can I change the 20 1 8 Ford Focus headlight bulbs myself? The 2015-2018 Focus headlight bulb replacement process is relatively simple, and we can usually complete it.   Please note: This guide is for the 2015-2018 Ford Focus with the original factory light assembly. Ford Focus makes of light bulbs will vary according to model and configuration, so it is advised that you consult your vehicle ownership manual or take out the light bulb to identify its number so as to make the right match. In case there are any mistakes or gaps in this guide, please send prompt feedback. Your support is appreciated! 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