What is the low beam headlight bulb size for a 2020 Subaru WRX STI?

The 2020 Subaru WRX STI uses a H11 bulb for the low beam headlights. We recommend upgrading to LED for better visibility.

What is the high beam headlight bulb size for a 2020 Subaru WRX STI?

The high beam bulb size for the 2020 Subaru WRX STI is 9005.

Why are my 2020 Subaru WRX STI headlights dim?

Dim headlights on a 2020 Subaru WRX STI can be caused by aging halogen bulbs, which lose brightness over time, or oxidation (cloudiness) on the plastic headlight lenses. Upgrading to a H11 LED conversion kit can provide a significantly brighter and whiter light output.

Which bulb fits the 2020 Subaru WRX STI fog light?

The 2020 Subaru WRX STI uses a H16 bulb for the fog light position.

Is the 2020 Subaru WRX STI single or dual beam?

The 2020 Subaru WRX STI uses a dual bulb headlight system. This means you have separate bulbs for high and low beams.

Can I install LED bulbs on my 2020 Subaru WRX STI?

Yes, the 2020 Subaru WRX STI comes with standard halogen bulbs from the factory, but they can be upgraded to LED. You will need a H11 LED conversion kit for the low beams.

Does the 2020 Subaru WRX STI have fog lights?

Yes, the 2020 Subaru WRX STI takes a H16 bulb for the fog light position.

Did the 2020 Subaru WRX STI change headlight bulb sizes from the previous year?

Yes — the 2020 Subaru WRX STI uses different bulb sizes than the 2019 model. The 2020 generation introduced this bulb configuration.

Is the 2020 Subaru WRX STI the first or last year to use H11 bulbs?

The 2020 Subaru WRX STI is the only year in the 2020 generation to use the H11 bulb for the low beam headlight.

How do I change the headlight on a 2020 Subaru WRX STI?

Turn off the vehicle and open the hood. Locate the headlight assembly from behind, remove the dust cover or retaining clip, disconnect the wiring harness, twist the old H11 bulb counter-clockwise to remove it, then insert the new bulb and reassemble. The whole process typically takes 10 to 30 minutes per side depending on accessibility.

Are LED headlights legal for a 2020 Subaru WRX STI?

LED bulbs used off-road or in auxiliary lights are legal everywhere. For on-road headlight use, legality varies by state. Many states allow LED retrofits as long as the beam pattern meets DOT standards. For the best legal compliance, choose a DOT-approved H11 LED kit that is designed as a direct replacement and produces a proper cutoff pattern without excessive glare.

How much does it cost to replace 2020 Subaru WRX STI headlights?

A pair of halogen H11 bulbs costs $15 to $40, while LED conversion kits run $25 to $60 per pair. If you have a shop do the work, expect an additional $20 to $50 in labor per bulb. Replacing them yourself at home saves the labor cost and usually takes under 30 minutes.

What is the difference between halogen and LED for a 2020 Subaru WRX STI?

Halogen bulbs produce a warm yellow light (around 3200K), last 500 to 1000 hours, and draw more power. LED bulbs emit a brighter white light (5000-6000K), last 25,000+ hours, and use less energy. LED upgrades for the H11 position are available as direct plug-and-play replacements.

The 2020 Subaru WRX STI has a unique bulb configuration not shared with adjacent model years.

Fitment Guaranteed for 2020 Subaru WRX STI

What Size Bulbs Does a 2020 Subaru WRX STI Use?

Correct headlight, fog light, and tail light bulb sizes. Sourced from OEM catalog data.

Installation Difficulty

Moderate (Dust covers often present)

Est. Replacement Cost

$15 - $40 (Halogen) / $30+ (LED)

What Lighting System Does the 2020 Subaru WRX STI Have?

Owners of the 2020 Subaru WRX STI will find a total of 13 lighting elements throughout the vehicle's exterior. It features an extensive lighting system powered by a dual-bulb halogen configuration using separate H11 low beam and 9005 high beam bulbs for precise light distribution.

Can You Put LED Bulbs in a 2020 Subaru WRX STI?

Upgrading to LED is one of the most effective ways to modernize your Subaru's appearance and safety profile. We recommend starting your upgrade with the H11 low beams, as they see the most use. Adding a matching 9005 LED kit later will complete the look and ensure consistent lighting performance. Don't forget the H16 fog lights; switching these to LED can dramatically improve your visibility in adverse weather.

2020 Subaru WRX STI Bulb Size Chart

Position	Bulb Size	Shop
Turn Signal Front	7440NA	Buy 7440NA →
Fog Light	H16	Buy H16 →
Low Beam	H11	Buy H11 →
Daytime Running	9005	Buy 9005 →
High Beam	9005	Buy 9005 →
Side Marker	W5W	Buy W5W →
License Plate	W5W	Buy W5W →
Reverse Light	921	Buy 921 →
Turn Signal Rear	7440NA	Buy 7440NA →
Parking Light	W5W	Buy W5W →
Dome Light	DE3175	Buy DE3175 →
Map Light	DE3175	Buy DE3175 →
Trunk Light	168	Buy 168 →