2017 Ford Focus ST Bulb Size
Quick answer: the 2017 Ford Focus ST uses D3S or H11 low beams, D3S or H1 high beams, H8 fog lights and 3157R brake lights. Where two sizes are listed, it depends on your trim or headlight type, so check the chart below.
2017 Ford Focus ST bulb size chart
| Position | Bulb size (tap to shop) |
|---|---|
| Headlight Bulb High Beam and Low Beam | D3S |
| Fog Light Bulb Front | H8 |
| Headlight Bulb High Beam | H1 |
| Headlight Bulb Low Beam | H11 |
| Brake Light Bulb | 3157R |
| Parking Light Bulb | 168 |
| Tail Light Bulb | 3157R |
| Daytime Running Light Bulb | H1 |
| Back Up Reverse Light Bulb | 921 |
Tap any bulb size to see it on Amazon. Trims and mid-year changes can differ, so pull the old bulb and match the number on its base before you order.
Which bulb should I buy?
- Just need it working again? Buy the standard halogen in the same size. It's cheap, it's legal everywhere, and it takes five minutes.
- Want to see better at night without messing with anything? Step up to a brighter halogen. Same plug, more light, no wiring.
- Want the white, modern look? Go LED. Great for fog, reverse, plate and interior lights. For headlights, LED bulbs in a housing built for halogen can throw glare, so aim them after you install and check your state's rules before running them on the street.
Our picks by bulb size
D3S (headlight high beam and low beam)
- Top pick: SEALIGHT D3S HID bulbs
H8 (fog light front)
H1 (headlight high beam, daytime running light)
- Top pick: OSRAM Night Breaker Laser H1 halogen
H11 (headlight low beam)
3157R (brake light, tail light)
- Halogen: Sylvania 3157 Long Life (2 bulbs)
- LED: LASFIT 3157 red LED (2 pcs)
168 (parking light)
- Halogen: Sylvania 194 SilverStar (2 bulbs)
- LED: LASFIT 194 LED (2 pcs)
921 (back up reverse light)
- Halogen: Sylvania 921 Long Life (2 bulbs)
- LED: LASFIT 921 LED (pack of 2)
For brake lights and turn signals, match the LED color to the lens: red behind a red lens, amber for turn signals.
While you're in there
- Cloudy headlights? New bulbs won't fix a yellowed lens. A replacement housing makes a bigger difference than any bulb: see Ford Focus ST headlights at NTXGlow.
- Tail lights faded or cracked? Ford Focus ST tail lights at NTXGlow.
Common questions
What size is the low beam headlight bulb on a 2017 Ford Focus ST?
Headlight High Beam and Low Beam: D3S. Headlight Low Beam: H11.
What size is the high beam headlight bulb on a 2017 Ford Focus ST?
Headlight High Beam and Low Beam: D3S. Headlight High Beam: H1.
What size is the fog light bulb on a 2017 Ford Focus ST?
H8.
Are the brake light and tail light the same bulb on a 2017 Ford Focus ST?
Yes. Both use a 3157R.
Can I put LED bulbs in a 2017 Ford Focus ST?
Most sizes on this vehicle have a plug-in LED version. Fog, license plate and interior lights are the easy wins. For headlights, aim them after you install and check your local laws first. Some trims of this vehicle use HID (D-series) headlight bulbs. Replace those with the same HID size, not an LED.
How do I make sure I'm buying the right size?
Pull the old bulb and read the number stamped on its base, or check the bulb chart in your owner's manual. Trims and mid-year changes can differ from any chart, including this one.
Other Ford Focus ST years
2013 Ford Focus ST bulb sizes · 2014 Ford Focus ST bulb sizes · 2016 Ford Focus ST bulb sizes · 2018 Ford Focus ST bulb sizes
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