Buy Lexus RX450h Fog Light Assembly

The Lexus RX450h fog light-also called a fog lamp, driving light, or auxiliary light-mounts low in the front bumper and shines a wide, flat beam under heavy fog, rain, or snow. It uses an H11-size bulb on most 2010-2025 RX450h models, fits the vehicle's 12-volt circuit, and can be upgraded from halogen to LED for brighter light, lower power draw, and longer life. Properly aimed lights improve forward vision within the first 100 meters, reduce glare, and help other drivers see the hybrid SUV sooner. Materials like impact-resistant polycarbonate lenses and sealed housings rated to IP67 keep water and dirt out, while simple care-cleaning the lens and checking wiring-extends service life. Below is a deep dive into specs, fitment, installation, safety rules, and more.

Fog lights sit below the main headlamps on the RX450h and switch on only when the headlights are on low beam. Their beam pattern spreads wide and low so the light stays beneath the fog layer and bounces back less toward the driver. This hybrid uses the standard 12-volt system for the lamps, so there is no extra load on the high-voltage battery. (Lexus Canada, Facebook)

• 2010-2015 RX450h: H11 halogen bulb in a reflector housing. (Diode Dynamics)
• 2016-2022 RX450h/RX450hL: Still H11, but many trims move to a projector-style lens for a sharper cutoff. (Lexus Canada)
• 2023-2025 RX450h+: Factory LED modules (non-serviceable bulbs) with a built-in leveling motor on some trims.

Tip: Always match the build date on the driver-door sticker with the bulb chart in the owner's manual before ordering a replacement.

In thick fog or heavy rain, regular headlights can bounce light back at you and create a white wall. A low-mounted fog lamp cuts under that glare, letting you see lane lines, curbs, and pedestrians sooner. (ORACLE Lighting, The Sun)

• 55-watt H11 filament bulb. (XenonPro)
• About 1,350 lumens and a warm 3,200 K color-good for cutting through water droplets.

LED Upgrades

• Direct-fit H11 LED replacements draw 15-25 watts yet produce over 3,000 lumens. (Carifex)
• Cool white 5,000-6,500 K color improves contrast on road signs. (LED Light Expert)
• Many units include a built-in fan or heat sink for cooling. (Carifex)

Most RX450h fog lamps use clear polycarbonate lenses, a tough plastic that can take rock hits better than glass and still stay clear. (Stoggles, Inc., All About Vision)
Housings carry an IP67 rating, meaning they keep out dust and survive 30 minutes in 1 meter of water. (Fabrik Molded Plastics)

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1. Remove bumper trim under the fog lamp corner. Two clips and one screw hold it. (YouTube, YouTube)
2. Unplug the wiring harness by lifting the locking tab.
3. Unscrew the lamp housing (three Phillips screws).
4. Swap the bulb-do not touch the glass.
5. Re-fit the housing and test for leaks with a light mist of water.

Time: about 20 minutes per side with basic hand tools. (YouTube)

After installation, park 25 feet (7.6 m) from a wall on level ground. Turn the vertical adjuster screw until the top of the beam sits just below the hub-center line marked on the wall. (YouTube)

• Clean the lens with mild soap; harsh chemicals cloud polycarbonate. (Stoggles, Inc.)
• Check the rubber gasket yearly for cracks to keep the IP67 seal intact. (Fabrik Molded Plastics)
• Inspect wiring for chafing, especially near the wheel well.

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U.S. rules do not set specific brightness limits for auxiliary fog lamps, but misuse (leaving them on in clear weather) can draw fines. (NHTSA, The Sun)
Use fog lights only when visibility drops below about 100 m, then switch them off to avoid dazzling others. (, The Sun)

The RX450h's fog lamps run on the separate 12-volt battery, so they do not reduce electric-drive range or harm the high-voltage pack. (Facebook)

• LED conversion kits lower power draw, stay cooler, and last up to 30,000 hours. (Carifex)
• Yellow film overlays (3,000 K look) improve contrast in snow.
• Heated LED units prevent ice buildup in freezing climates.

LED fog lamps cut power use by roughly 60 % versus halogen, reducing the alternator load and saving fuel over time.

1. Fog-light bulb chart, H11 size, model years 2010-15.
2. Lexus online owner's manual portal for RX models 2010-2025.
3. NHTSA interpretation letter on auxiliary lamps.
4. Comparison of LED vs halogen output and efficiency.
5. Kelvin color-temperature guide for LEDs.
6. Article on why fog lights improve safety in rain and fog.
7. Community discussion contrasting DRLs and fog lamps.
8. Hybrid owners' post on 12-volt fog-light draw.
9. Video tutorial on proper fog-light aiming.
10. Step-by-step bumper-corner removal video.
11. Weather-safety news on fog-driving tips.
12. Dashboard symbol and legal-use explanation.
13. Polycarbonate lens durability article.
14. H11 wattage and lumen data sheet.
15. Polycarbonate vs plastic lens comparison article.