Diode Dynamics DD0477P 5202 PSX24W SL2 LED Fog Light Bulbs Pair White

The Diode Dynamics DD0477P SL2 5202 LED Fog Light Bulbs are a direct plug-and-play replacement for any vehicle equipped with the 5202 / PSX24W / H16-EU tab-lock fog light socket. Designed, engineered, and manufactured in St. Louis, Missouri, USA, the SL2 delivers 1,400 measured lumens per bulb at a clean 6000K cool white color temperature, replacing your dim factory halogens with a significantly brighter, more modern output. The fully integrated internal driver eliminates any external module to tuck away, installation takes 20 to 30 minutes with basic hand tools, and the pair is backed by Diode Dynamics' Limited Lifetime Warranty.

Why the DD0477P SL2 Outperforms Stock Halogens

Factory 5202 halogen fog bulbs were engineered to a price point, not a performance standard. A standard OEM 5202 halogen produces roughly 450 to 600 lumens in real-world housing output. The SL2 delivers 1,400 measured lumens per bulb, photometrically measured from inside the housing, not raw LED chip output. That distinction matters: Diode Dynamics publishes effective lumens, the number that reflects what actually reaches the road.

The SL2 achieves this output through multi-die automotive-grade LED emitters mounted on a copper PCB with a thermal phase-change interface, housed in a die-cast A360 aluminum body with a passive heatsink. No fan to fail. No external driver to mount. The Optimized Optical Focus design positions the LED emitter at the same focal point as the original halogen filament, preserving your fog light housing's engineered beam pattern without adding unwanted glare toward oncoming drivers.

SL2 Series Technology

The SL2 is Diode Dynamics' second-generation replacement for the popular SLF fog light bulb, which has been discontinued. The SL2 refines the platform in every meaningful way: a more compact form factor fits tighter housings, the internal constant-current driver replaces the external piggyback module, and a simple collar rotation allows you to clock the emitter for perfect beam alignment without tools. Operating voltage spans 9 to 30 volts, making these compatible with both standard 12V passenger vehicles and 24V commercial platforms. Operating temperature range is -40 degrees F to 185 degrees F, ensuring reliable cold-start performance in northern climates and heat tolerance in desert conditions.

What's Included

• 2x Diode Dynamics DD0477P SL2 LED Bulbs (5202 / PSX24W, 6000K Cool White)
• Installation instructions

Fitment: Compatible Vehicles with 5202 / PSX24W Fog Light Socket

These bulbs fit any vehicle equipped with the 5202 tab-lock fog light or DRL socket. Confirm your trim and option package before ordering; not all trim levels on a given model year include factory fog lights. The 5202 socket is commonly found on GM, Chrysler, Jeep, Ford, Subaru, Cadillac, Pontiac, MINI, and select BMW models. Each year is listed individually below.

Important fitment notes: Cadillac Escalade uses the 5201 socket, which is similar but not identical to 5202 verify before ordering. Camaro fitment applies to halogen headlight trims only; RS and 2SS with HID/projector headlights do not use this socket for fog lights. Cadillac CTS fitment is for DRL position on HID-headlight trims only. BMW models listed are select configurations only confirm socket type before purchasing.

Full Specifications

Made in the USA

Diode Dynamics designs, engineers, and manufactures the SL2 at their facility in St. Louis, Missouri. This is not an offshore-engineered product badged with an American name -- the SL2 is built in the USA, which is why it carries a Limited Lifetime Warranty backed by a domestic manufacturer with the support infrastructure to honor it. When you need a replacement or have a warranty question, you are dealing with the company that actually built the bulb.

California Residents: This product contains chemicals known to the State of California to cause cancer and reproductive harm. For more information, visit www.p65warnings.ca.gov.

Compare: Diode Dynamics 5202 / PSX24W LED Bulb Options

Diode Dynamics offers the 5202 / PSX24W socket in multiple output tiers and configurations. The table below covers the current lineup so you can choose the right level for your application.

The DD0477P SL2 Pair delivers more than 5x the measured output of the HP48 and nearly 3x the output of the XP80, with a lifetime warranty versus the 3-year coverage on the lower tiers. For drivers who want a genuine functional improvement in fog light brightness, the SL2 is the correct choice. If you prefer selective yellow output for heavy fog or snow driving, the DD0478P yellow pair uses the same SL2 platform.

Installation Overview

The DD0477P installs in 20 to 30 minutes with basic hand tools. No modification, cutting, or rewiring is required. The OEM-size connector plugs directly into your factory fog light socket.

• Remove the factory 5202 halogen bulb by rotating and pulling from the housing
• Insert the SL2 bulb and rotate the collar to clock the emitter for proper beam alignment
• Connect the factory plug directly to the SL2 no adapter needed
• Repeat for the second side
• Verify correct polarity: if the bulb does not illuminate, reverse the connector orientation
• If your vehicle displays a bulb-out warning or flickering after installation, a Diode Dynamics 5202 Anti-Flicker Module (sold separately) resolves this on CANBUS-sensitive vehicles

About Diode Dynamics

Diode Dynamics is an automotive LED manufacturer based in St. Louis, Missouri. Unlike resellers who import and rebadge overseas LED products, Diode Dynamics designs and manufactures their SL2 and SL1 series products in-house at their St. Louis facility. Their engineering approach centers on published, photometrically measured lumen output not inflated raw LED chip numbers and a direct-fit optical design that preserves OEM beam patterns. The SL2 carries a Limited Lifetime Warranty, which is among the strongest coverage offered in the automotive LED segment.

Frequently Asked Questions

What vehicles does the DD0477P fit?
The DD0477P fits any vehicle using the 5202 / PSX24W / H16-EU tab-lock fog light or DRL socket. This socket is found on a wide range of GM, Chrysler, Jeep, Ford, Subaru, Pontiac, Cadillac, MINI, and select BMW models from approximately 2007 through the mid-2020s. The full fitment table above lists every confirmed year and model individually. Always confirm your trim level and option package includes factory fog lights before ordering.

Will the DD0477P work on my Jeep Wrangler JK or JL?
Yes. The Wrangler JK (2010 to 2016) and Wrangler JL (2018 and newer) both use the 5202 socket for fog lights and are confirmed fitments. Some Wrangler owners on CANBUS-equipped JL models report occasional flicker warnings on first start; the Diode Dynamics 5202 Anti-Flicker Module (sold separately) resolves this if you encounter it.

Is the DD0477P legal for use on public roads?
When installed in the fog light or DRL position, yes. These bulbs are legal for street use in the USA as fog lights. They are not DOT/FMVSS108 compliant for headlight use (low beam or high beam) and should not be installed in headlight positions for on-road driving. For off-road, ATV, or snowmobile use, no restriction applies.

Does this product require any wiring modification or anti-flicker resistor?
No modification is required for most vehicles. The SL2 is plug-and-play with no external resistor, load equalizer, or relay needed for standard installations. A small number of vehicles with highly sensitive CANBUS systems may display a flicker or bulb-out warning; Diode Dynamics' 5202 Anti-Flicker Module (sold separately) addresses this if it occurs on your specific vehicle.

What is the difference between the 5202, PSX24W, and H16-EU socket designations?
They all refer to the same physical tab-lock bulb connector. 5202 is the US trade number, PSX24W is the European / JIS designation, and H16-EU is an alternate European name for the same socket. Note that H16-EU is different from the H16 (US) socket used on some Ford and Dodge vehicles the H16 US socket is electrically and physically similar to H11. If your vehicle is a US-market GM, Chrysler, Jeep, or Subaru with factory fog lights, you almost certainly have the 5202 / PSX24W tab-lock socket.

What is the color difference between the DD0477P (white) and the DD0478P (yellow)?
The DD0477P produces 6000K cool white light, which is a clean, modern white with no blue tint it closely matches OEM LED headlight color on newer vehicles. The DD0478P produces 3000K selective yellow, which some drivers prefer in heavy fog, rain, or snow because yellow wavelengths scatter less in suspended water droplets. Both bulbs use the same SL2 emitter platform and carry the same Lifetime Warranty. Color choice comes down to personal preference and driving conditions.

Does the SL2 replace the SLF?
Yes. The SL2 is the direct successor to the SLF, which Diode Dynamics has discontinued. The SL2 improves on the SLF with a more compact housing, a fully integrated internal driver (no external module), easier collar rotation for beam clocking, and higher measured output (1,400 lm vs. the SLF's 780 lm). The SL2 also carries a Limited Lifetime Warranty; the SLF is available only as clearance stock with a 30-day warranty only.

What warranty does the DD0477P carry?
The DD0477P is covered by Diode Dynamics' Limited Lifetime Warranty. If a defect occurs, Diode Dynamics will diagnose the issue and provide a replacement if warranted. This warranty applies specifically to the SL2 series; entry-level products such as the HP48 and XP80 carry a 3-year warranty, and discontinued clearance items like the SLF carry only a 30-day warranty. Full warranty terms are available at diodedynamics.com/warranty.

Are these bulbs Made in USA?
Yes. Diode Dynamics designs, engineers, and manufactures the SL2 series at their facility in St. Louis, Missouri. This is confirmed by Diode Dynamics' own branding and multiple authorized dealer listings. The lower-tier HP48 bulb was manufactured overseas; the SL2 is the company's domestic-built premium product line.