What Size Bulbs Does a 2016 Scion iA 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 2016 Scion iA Have?
The 2016 Scion iA features a comprehensive lighting system with 9 bulb positions. It uses halogen technology with 9003 LED low beams and N/A high beams in a dual-bulb configuration.
Can You Put LED Bulbs in a 2016 Scion iA?
To upgrade the 2016 Scion iA 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 2016 Scion iA
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. On the 2016 iA, you will likely encounter rubber dust covers behind the headlight housing. These pull off by hand or unscrew depending on the design. Allow about 15 to 20 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
2016 Scion iA Complete Bulb Size Chart
| Position | Bulb Size | Shop |
|---|---|---|
Low Beam | 9003 LED | Buy 9003 LED |
High Beam | N/A | Buy N/A |
Fog Light | N/A | Buy N/A |
Brake Light | LED Bulb | Buy LED Bulb |
Side Marker | 2825 LED | Buy 2825 LED |
Turn Signal Front | 7444NA LED | Buy 7444NA LED |
Turn Signal Rear | 7440NA LED | Buy 7440NA LED |
Dome Light | N/A | Buy N/A |
License Plate | 2825 | Buy 2825 |
Map Light | N/A | Buy N/A |
Parking Light | 7444NA | Buy 7444NA |
Reverse Light | 921 | Buy 921 |
Trunk Light | 2821 | Buy 2821 |
Want to upgrade everything at once?
Shop Complete LED Kit for 2016 Scion iAHow Long Do 2016 Scion iA Headlight Bulbs Last?
Standard halogen headlights on the 2016 Scion iA 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 10 years old, the original bulbs on your iA 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 2016 Scion iA?
The 9003 low beam bulb on the 2016 Scion iA 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.
2016 Scion iA Headlight FAQ
Did Scion iA Bulb Sizes Change Over the Years?
We currently have bulb data for the 2016 Scion iA. Check back as we expand our database with additional model years and trim-level variations.
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Other Vehicles That Use 9003 LED Bulbs
These vehicles from other makes also use a 9003 LED low beam bulb: