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Forward Lighting
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Exterior Lighting
- Back Up Light Bulb » 921
- Daytime Running Light Bulb (w/halogen capsule headlamps) » 9005
- License Plate Light Bulb » 168
- Parking Light Bulb (w/halogen capsule headlamps) » 168
- Parking Light Bulb with halogen headlights » 168
- Side Marker Light Bulb Front » 168
- Side Marker Light Bulb Rear » 168
- Turn Signal Light Bulb Front » 7440A
- Turn Signal Light Bulb Rear » 7440A
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Interior Lighting
2018 Subaru WRX Headlight Bulb Size
Subaru gave the WRX meaningful improvements for 2018 — revised suspension tuning, better NVH isolation, and an available Performance Package with Recaro seats and upgraded Brembo brakes. The result was a WRX that started getting refined without losing the raw, rally-bred edge that built its following. The 2018 Subaru WRX headlight bulb size is H11 for the low beams, 9005 for the high beams, and H16 for the fog lights. Halogen reflector headlights come standard on the base and Premium trims, with LED headlights reserved for the Limited.
For owners running the halogen setup, the yellowish factory bulbs are the one thing that feels dated on an otherwise sharp-looking car. Switching to 2018 Subaru WRX LED headlights transforms the front end from warm and muted to crisp and modern — a change that is immediately obvious whether you are pulling into a parking lot or lining up at a Subaru meet.
LED and HID Headlight Upgrades for the 2018 WRX
The 2018 WRX's revised suspension made it a better driver's car, and the headlight upgrade is the visual counterpart to that mechanical improvement. An LED conversion kit for the H11 low beams slots directly into the factory reflector housing. The plug-and-play connection means no wire cutting, no splicing, and no adapter brackets. You pull the halogen, push in the LED, and the 6000K white beam is ready the moment you turn the lights on.
For WRX owners with the Performance Package who push the car hard on backroads and at track days, HID kits deliver the maximum beam intensity available. The xenon arc produces a deeper, more concentrated light pattern that reveals road surface changes and elevation shifts earlier than halogen or LED. Each side requires a small ballast, and the full installation typically wraps up in under an hour.
All HID Nation kits come with free shipping and a lifetime warranty — fitting for a car that owners tend to keep, modify, and drive hard for years.
Frequently Asked Questions
What bulb sizes does the 2018 Subaru WRX take?
The 2018 Subaru WRX uses H11 for the low beams, 9005 for the high beams, and H16 for the fog lights. Note that the fog light bulb is H16, not H11 — while the two look similar, they have different tab configurations. All three sizes are available in LED conversion kits for a complete front-end lighting upgrade.
Does the 2018 WRX Performance Package change the headlight bulbs?
No. The 2018 WRX Performance Package adds Recaro sport seats, Brembo brakes, and other handling enhancements, but does not alter the headlight system. The bulb sizes remain H11 low beam and 9005 high beam regardless of whether you have the base, Premium, or Performance Package trim. LED and HID conversion kits install identically on all configurations.
How do I upgrade the fog lights separately from the headlights on the 2018 WRX?
The 2018 WRX fog lights use H16 bulbs, which require a separate kit from the H11 headlight bulbs. Access the fog lights from underneath the front bumper — there is a small access panel or you can reach behind the fog light housing from below. Remove the factory H16 halogen, insert the H16 LED replacement, and you are done. Upgrading headlights and fogs together ensures all forward lighting matches at 6000K white.
Will aftermarket LED headlights interfere with the 2018 WRX electronics?
The 2018 WRX uses a relatively straightforward headlight circuit without aggressive electronic monitoring. HID Nation's LED bulbs are engineered to draw wattage comparable to the factory halogen, so the vehicle does not detect a change. Dashboard warnings, flicker, and radio interference are not typical issues on the VA-generation WRX. In the unlikely event of a flicker, an anti-flicker capacitor resolves it instantly.
Can I install LED headlights on my 2018 WRX STI too?
Yes. The 2018 WRX STI shares the same headlight housings and bulb sizes as the standard WRX — H11 low beam, 9005 high beam, and H16 fog light. Despite the STI's more aggressive front lip and different hood scoop, the headlight assembly is identical. Any LED or HID kit that fits the WRX will fit the STI with no changes needed.