What is the low beam headlight bulb size for a 2021 Jeep Gladiator?

The 2021 Jeep Gladiator uses a H13 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 Jeep Gladiator?

The high beam bulb size for the 2021 Jeep Gladiator is N/A.

Why are my 2021 Jeep Gladiator headlights dim?

Dim headlights on a 2021 Jeep Gladiator can be caused by aging halogen bulbs, which lose brightness over time, or oxidation (cloudiness) on the plastic headlight lenses. Upgrading to a H13 LED conversion kit can provide a significantly brighter and whiter light output.

Which bulb fits the 2021 Jeep Gladiator fog light?

The 2021 Jeep Gladiator typically does not come with factory fog lights in all trim levels. If your vehicle is equipped with them, check the manual as sizes can vary by trim.

Is the 2021 Jeep Gladiator single or dual beam?

The 2021 Jeep Gladiator uses a dual bulb headlight system. This means you have separate bulbs for high and low beams.

Can I install LED bulbs on my 2021 Jeep Gladiator?

Yes, the 2021 Jeep Gladiator comes with standard halogen bulbs from the factory, but they can be upgraded to LED. You will need a H13 LED conversion kit for the low beams.

Did the 2021 Jeep Gladiator change headlight bulb sizes from the previous year?

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

Is the 2021 Jeep Gladiator the first or last year to use H13 bulbs?

The 2021 Jeep Gladiator is the only year in the 2021 generation to use the H13 bulb for the low beam headlight.

How do I change the headlight on a 2021 Jeep Gladiator?

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 H13 bulb counter-clockwise to remove it, then insert the new bulb and reassemble. Note: Jeep vehicles use a CANbus system, so LED replacements may need an anti-flicker decoder. The whole process typically takes 10 to 30 minutes per side depending on accessibility.

Are LED headlights legal for a 2021 Jeep Gladiator?

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 H13 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 Jeep Gladiator headlights?

A pair of halogen H13 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 Jeep Gladiator?

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 H13 position are available as direct plug-and-play replacements. Since the Jeep uses CANbus monitoring, choose a CANbus-compatible LED kit to avoid dashboard errors.

The 2021 Jeep Gladiator has a unique bulb configuration not shared with adjacent model years.

Fitment Guaranteed for 2021 Jeep Gladiator

What Size Bulbs Does a 2021 Jeep Gladiator 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 Jeep Gladiator Have?

The 2021 Jeep Gladiator utilizes a refined lighting configuration featuring 4 distinct bulb positions. It features a standard lighting system powered by a dual-bulb halogen configuration using separate H13 low beam and high beam bulbs for precise light distribution. This model belongs to the late years of the Gladiator's 1962-2022 production span. Note that Jeep vehicles typically feature a CANbus electrical monitor that checks for specific bulb resistance.

LED Flicker Warning

This vehicle is known to use a CANbus system. Installing standard LEDs may cause flickering.

Use a CANbus decoder.

Can You Put LED Bulbs in a 2021 Jeep Gladiator?

For a Jeep built for the road and trail, LED upgrades provide the high-contrast lighting needed for better obstacle detection. We recommend starting your upgrade with the H13 low beams, as they see the most use. Adding a matching LED kit later will complete the look and ensure consistent lighting performance. Because Jeep utilizes a CANbus system, standard LED bulbs may cause "bulb out" errors on your dashboard. Always opt for "Error-Free" or CANbus-ready kits which include the necessary resistors.

2021 Jeep Gladiator Bulb Size Chart

Position	Bulb Size	Shop
Low Beam	H13	Buy H13 →
Daytime Running	7443	Buy 7443 →
Parking Light	7443	Buy 7443 →
Reverse Light	921	Buy 921 →

How do the 2021 Jeep Gladiator's bulbs compare to other years?

The 2021 Jeep Gladiator 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 Gladiator Years

2022 2020 1969 1968 1965 1963 1962

Other Vehicles That Use H13 Bulbs

2022 Ford E-350 Super Duty 2022 Ford F-250 Super Duty 2022 Ford F-350 Super Duty 2022 Ford F-450 Super Duty 2022 Ford F-550 Super Duty 2022 Ford F-600 Super Duty

H13 Comparisons

9008 vs H13