What is the low beam headlight bulb size for a 2021 Ford F-550 Super Duty?

The 2021 Ford F-550 Super Duty 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 Ford F-550 Super Duty?

The high beam bulb size for the 2021 Ford F-550 Super Duty is N/A.

Why are my 2021 Ford F-550 Super Duty headlights dim?

Dim headlights on a 2021 Ford F-550 Super Duty 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 Ford F-550 Super Duty fog light?

The 2021 Ford F-550 Super Duty uses a 9140 bulb for the fog light position.

Is the 2021 Ford F-550 Super Duty single or dual beam?

The 2021 Ford F-550 Super Duty 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 Ford F-550 Super Duty?

Yes, the 2021 Ford F-550 Super Duty 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.

Does the 2021 Ford F-550 Super Duty have fog lights?

Yes, the 2021 Ford F-550 Super Duty takes a 9140 bulb for the fog light position.

Did the 2021 Ford F-550 Super Duty change headlight bulb sizes from the previous year?

Yes — the 2021 Ford F-550 Super Duty uses different bulb sizes than the 2015 model. The 2021 generation introduced this bulb configuration.

Is the 2021 Ford F-550 Super Duty the first or last year to use H13 bulbs?

The 2021 Ford F-550 Super Duty 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 Ford F-550 Super Duty?

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. The whole process typically takes 10 to 30 minutes per side depending on accessibility.

Are LED headlights legal for a 2021 Ford F-550 Super Duty?

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 Ford F-550 Super Duty 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 Ford F-550 Super Duty?

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.

The 2021 Ford F-550 Super Duty has a unique bulb configuration not shared with adjacent model years.

Fitment Guaranteed for 2021 Ford F-550 Super Duty

What Size Bulbs Does a 2021 Ford F-550 Super Duty 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 Ford F-550 Super Duty Have?

The 2021 Ford F-550 Super Duty utilizes a refined lighting configuration featuring 10 distinct bulb positions. It features a comprehensive lighting system powered by a dual-bulb halogen configuration using separate H13 low beam and high beam bulbs for precise light distribution.

Can You Put LED Bulbs in a 2021 Ford F-550 Super Duty?

For a Ford 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. Don't forget the 9140 fog lights; switching these to LED can dramatically improve your visibility in adverse weather.

2021 Ford F-550 Super Duty Bulb Size Chart

Position	Bulb Size	Shop
Fog Light	9140	Buy 9140 →
Turn Signal Front	7440NA	Buy 7440NA →
Low Beam	H13	Buy H13 →
Daytime Running	7443	Buy 7443 →
Turn Signal Rear	3157	Buy 3157 →
Tail Light	3157	Buy 3157 →
Parking Light	7440NA	Buy 7440NA →
Reverse Light	7440	Buy 7440 →
Brake Light	3157	Buy 3157 →
Dome Light	912	Buy 912 →

How do the 2021 Ford F-550 Super Duty's bulbs compare to other years?

The 2021 Ford F-550 Super Duty changed bulb sizes from 2015. 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. ← 2015 2022 →

Finding the best installation guide...

Other F-550 Super Duty Years

2022 2015 2014 2013 2012 2011 2010 2009 2008 2007 2006 2005 2004 2003 2002 2001 2000 1999

Other Vehicles That Use H13 Bulbs

2022 Jeep Gladiator 2022 Jeep Renegade 2022 Jeep Wrangler 2021 Nissan NV1500 2021 Nissan NV200 2021 Nissan NV2500

H13 Comparisons

9008 vs H13