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Fitment Guaranteed for 2004 Scion xA

What Size Bulbs Does a 2004 Scion xA Use?

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

Installation Difficulty

Easy (Plug and Play)

Est. Replacement Cost

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

What Lighting System Does the 2004 Scion xA Have?

The 2004 Scion xA features an extensive lighting system with 11 bulb positions. It uses halogen technology with 9003 LED low beams and N/A high beams in a dual-bulb configuration. The xA has been available from 2004 to 2006, and the 2004 model falls in the early-generation years.

Can You Put LED Bulbs in a 2004 Scion xA?

To upgrade the 2004 Scion xA headlights to LED, you will need a 9003 LED LED kit for the low beams and a N/A LED kit for the high beams. Start with the low beams since they are used most often and have the biggest impact on nighttime visibility.

How to Replace Bulbs on a 2004 Scion xA

The 9003 bulb uses a spring clip retainer with a three-prong base identical to H4. To remove the old bulb, disconnect the wiring harness first, then twist the bulb counter-clockwise and pull it out. Older model years like the 2004 xA typically offer easy access to the headlight bulbs from behind the headlight assembly under the hood. Most owners can complete the swap in under 10 minutes per side. When installing the new bulb, avoid touching the glass with bare fingers. Skin oils create hot spots that shorten bulb life. Wear clean gloves or handle the bulb by its plastic base only.

Full Upgrade Bundle

Upgrade All 13 Positions at Once

Low Beam: 9003 LEDHigh Beam: N/AFog Light: N/ABrake Light: 168Side Marker: 7443 LEDTurn Signal Front: 2827 LEDTurn Signal Rear: 7440 LED or 7440NA LEDDome Light: DE3175License Plate: 168Map Light: DE3175Parking Light: 168Reverse Light: 921Trunk Light: DE3175
Shop Complete LED Kit

2004 Scion xA Complete Bulb Size Chart

PositionBulb SizeShop
Low Beam
9003 LEDBuy 9003 LED
High Beam
N/ABuy N/A
Fog Light
N/ABuy N/A
Brake Light
168Buy 168
Side Marker
7443 LEDBuy 7443 LED
Turn Signal Front
2827 LEDBuy 2827 LED
Turn Signal Rear
7440 LED or 7440NA LEDBuy 7440 LED or 7440NA LED
Dome Light
DE3175Buy DE3175
License Plate
168Buy 168
Map Light
DE3175Buy DE3175
Parking Light
168Buy 168
Reverse Light
921Buy 921
Trunk Light
DE3175Buy DE3175

Want to upgrade everything at once?

Shop Complete LED Kit for 2004 Scion xA
Installation Guide
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How Long Do 2004 Scion xA Headlight Bulbs Last?

Standard halogen headlights on the 2004 Scion xA have an expected lifespan of 500 to 1,000 hours, which works out to roughly 2 to 3 years of normal use. Signs of a failing halogen bulb include noticeably dimmer output, a yellowish tint compared to the other headlight, or intermittent flickering. At 22 years old, the original bulbs on your xA are likely overdue for replacement. Even if they still illuminate, reduced brightness significantly impacts nighttime safety. When one headlight burns out, replace both sides at the same time. Bulbs from the same batch age at similar rates, and mismatched brightness is distracting to oncoming drivers.

What Bulbs Are Compatible with the 2004 Scion xA?

The 9003 low beam bulb on the 2004 Scion xA is cross-compatible with H4, HB2 bulbs. These share the same physical base and electrical connection, so they will fit the socket. However, 9003 is the recommended size because it is optimized for the wattage and beam pattern designed into your headlight housing. The 9003 is a dual-filament bulb, meaning one bulb contains two separate filaments for low and high beams. This is a different design from single-filament bulbs like H11 or 9005. Make sure any LED replacement is specifically designed for dual-filament operation. Using the wrong bulb size can cause improper beam patterns that reduce your visibility and blind other drivers. It can also cause overheating inside the headlight housing, potentially warping the plastic lens or reflector. Always verify the bulb number before purchasing.

2004 Scion xA Headlight FAQ

The 2004 Scion xA uses a 9003 LED bulb for the low beam headlights. We recommend upgrading to LED for better visibility.

The high beam bulb size for the 2004 Scion xA is N/A.

The 2004 Scion xA uses a dual bulb headlight system. This means you have separate bulbs for high and low beams.

Yes, the 2004 Scion xA comes with standard halogen bulbs from the factory, but they can be upgraded to LED. You will need a 9003 LED LED conversion kit for the low beams.

Yes, the 2004 Scion xA takes a N/A bulb for the fog light position.

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 9003 LED 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.

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 9003 LED LED kit that is designed as a direct replacement and produces a proper cutoff pattern without excessive glare.

A pair of halogen 9003 LED 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.

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 9003 LED position are available as direct plug-and-play replacements.

Did Scion xA Bulb Sizes Change Over the Years?

The Scion xA has maintained consistent bulb sizes across all model years from 2004 to 2006. The low beam has used a 9003 LED bulb throughout, which means replacement parts and LED upgrade kits are widely available and well-tested for this model. If you find a deal on bulbs for any xA year in this range, they will fit your 2004 model.

Other xA Years

20062005
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Other Vehicles That Use 9003 LED Bulbs

These vehicles from other makes also use a 9003 LED low beam bulb:

2023 Kia Rio2021 Toyota Tundra2020 Honda Fit2019 MINI Cooper2019 Nissan Micra2019 Nissan Versa