What is the low beam headlight bulb size for a 2021 Kia Niro?

The 2021 Kia Niro uses a HID-D8S LED bulb for the low beam headlights. We recommend upgrading to LED for better visibility.

What is the high beam headlight bulb size for a 2021 Kia Niro?

The high beam bulb size for the 2021 Kia Niro is HID-D8S LED.

Why are my 2021 Kia Niro headlights dim?

Dim headlights on a 2021 Kia Niro can be caused by aging halogen bulbs, which lose brightness over time, or oxidation (cloudiness) on the plastic headlight lenses. Upgrading to a HID-D8S LED LED conversion kit can provide a significantly brighter and whiter light output.

Which bulb fits the 2021 Kia Niro fog light?

The 2021 Kia Niro uses a H8 LED bulb for the fog light position.

Is the 2021 Kia Niro single or dual beam?

The 2021 Kia Niro uses a single bulb (dual filament) headlight system. This means one bulb controls both high and low beams.

Can I install LED bulbs on my 2021 Kia Niro?

Yes, the 2021 Kia Niro comes with standard halogen bulbs from the factory, but they can be upgraded to LED. You will need a HID-D8S LED LED conversion kit for the low beams.

Does the 2021 Kia Niro have fog lights?

Yes, the 2021 Kia Niro takes a H8 LED bulb for the fog light position.

Did the 2021 Kia Niro change headlight bulb sizes from the previous year?

Yes — the 2021 Kia Niro uses different bulb sizes than the 2020 model. The 2021 generation introduced this bulb configuration.

Is the 2021 Kia Niro the first or last year to use HID-D8S LED bulbs?

The 2021 Kia Niro is the only year in the 2021 generation to use the HID-D8S LED bulb for the low beam headlight.

How do I change the headlight on a 2021 Kia Niro?

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 HID-D8S 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.

Are LED headlights legal for a 2021 Kia Niro?

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 HID-D8S LED 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 2021 Kia Niro headlights?

A pair of halogen HID-D8S 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.

What is the difference between halogen and LED for a 2021 Kia Niro?

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 HID-D8S LED position are available as direct plug-and-play replacements.

The 2021 Kia Niro has a unique bulb configuration not shared with adjacent model years.

Fitment Guaranteed for 2021 Kia Niro

What Size Bulbs Does a 2021 Kia Niro 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 2021 Kia Niro Have?

Lighting on the 2021 Kia Niro is managed by a total of 14 bulbs, covering everything from primary headlights to signal indicators. It features an extensive lighting system powered by a halogen-based setup where a single HID-D8S LED dual-filament bulb handles both low and high beam duties within the same reflector. This model belongs to the late years of the Niro's 2017-2022 production span.

Can You Put LED Bulbs in a 2021 Kia Niro?

Upgrading to LED is one of the most effective ways to modernize your Kia's appearance and safety profile. Since your Niro uses a single HID-D8S LED bulb for both high and low beams, ensure your chosen LED kit is "dual-beam" compatible. This allows the LED circuitry to mimic the two-filament design of the original halogen bulb. Don't forget the H8 LED fog lights; switching these to LED can dramatically improve your visibility in adverse weather.

2021 Kia Niro Bulb Size Chart

Position	Bulb Size	Shop
Low Beam	HID-D8S LED	Buy HID-D8S LED →
High Beam	HID-D8S LED	Buy HID-D8S LED →
Fog Light	H8 LED	Buy H8 LED →
Brake Light	3157	Buy 3157 →
Side Marker	168 LED	Buy 168 LED →
Turn Signal Front	12496 LED	Buy 12496 LED →
Turn Signal Rear	168 LED	Buy 168 LED →
Reverse Light	921	Buy 921 →
Dome Light	6461	Buy 6461 →
License Plate	168	Buy 168 →
Map Light	175	Buy 175 →
Parking Light	LED Bulb	Buy LED Bulb →
Trunk Light	6461	Buy 6461 →
Tail Light	3157	Buy 3157 →

How do the 2021 Kia Niro's bulbs compare to other years?

The 2021 Kia Niro changed bulb sizes from 2020. The previous model year used a different configuration.

The 2022 model switched to a different bulb configuration.

This bulb configuration covers the 2021 model years. ← 2020 2022 →

Finding the best installation guide...

Other Niro Years

2022 2020 2019 2018 2017

Other Vehicles That Use HID-D8S LED Bulbs

2019 Volkswagen Beetle 2013 Ford Focus