What Size Bulbs Does a 2018 Lexus RC300 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 2018 Lexus RC300 Have?
The 2018 Lexus RC300 features an extensive lighting system with 12 bulb positions. It uses factory LED technology with integrated LED headlight modules. The RC300 has been available from 2016 to 2019, and the 2018 model falls in the mid-generation years.
Can You Put LED Bulbs in a 2018 Lexus RC300?
Upgrading the 2018 Lexus RC300 to LED headlights is straightforward since it uses a single LED Headlights dual-filament bulb for both low and high beams. You only need one pair of LED bulbs to upgrade both functions. Look for a LED Headlights LED kit that specifically supports dual-filament operation to ensure both beams work correctly. For the fog lights, a LED Fog Light LED bulb provides a clean white output that pairs well with LED headlights.
How to Replace Bulbs on a 2018 Lexus RC300
To remove the headlight bulb, disconnect the wiring harness, then twist the bulb counter-clockwise and pull it straight out of the housing. On the 2018 RC300, you will likely encounter rubber dust covers behind the headlight housing. These pull off by hand or unscrew depending on the design. Allow about 15 to 20 minutes per side. This vehicle has factory-integrated LED headlight modules. These are not user-serviceable bulbs. If your LED headlights fail, the entire headlight assembly or LED module may need to be replaced by a dealer or qualified technician. The fog lights are accessed from underneath the front bumper. You may need to remove a few plastic clips or screws from the fender liner to reach the LED Fog Light fog light socket.
Full Upgrade Bundle
Upgrade All 12 Positions at Once
2018 Lexus RC300 Complete Bulb Size Chart
| Position | Bulb Size | Shop |
|---|---|---|
Low Beam | LED Headlights | Buy LED Headlights |
High Beam | LED Headlights | Buy LED Headlights |
Fog Light | LED Fog Light | Buy LED Fog Light |
Brake Light | LED Bulb | Buy LED Bulb |
Side Marker | LED Bulb | Buy LED Bulb |
Turn Signal Front | 7444NA LED | Buy 7444NA LED |
Turn Signal Rear | 7440NA LED | Buy 7440NA LED |
Reverse Light | 921 | Buy 921 |
Dome Light | LED Bulb | Buy LED Bulb |
License Plate | LED Bulb | Buy LED Bulb |
Parking Light | 7444NA | Buy 7444NA |
Trunk Light | 168 | Buy 168 |
Want to upgrade everything at once?
Shop Complete LED Kit for 2018 Lexus RC300How Long Do 2018 Lexus RC300 Headlight Bulbs Last?
Factory LED headlights on the 2018 Lexus RC300 are rated for approximately 25,000 to 50,000 hours of use, which translates to roughly 10 to 15 years of normal driving. LED modules rarely burn out suddenly. Instead, they gradually dim over time or develop dead zones within the LED array. At 8 years old, the original bulbs on your RC300 are likely overdue for replacement, though LED modules may still have life left. Even if they still illuminate, reduced brightness significantly impacts nighttime safety. When one headlight burns out, replace both sides at the same time. Bulbs from the same batch age at similar rates, and mismatched brightness is distracting to oncoming drivers.
What Bulbs Are Compatible with the 2018 Lexus RC300?
Using the wrong bulb size can cause improper beam patterns that reduce your visibility and blind other drivers. It can also cause overheating inside the headlight housing, potentially warping the plastic lens or reflector. Always verify the bulb number before purchasing.
2018 Lexus RC300 Headlight FAQ
Did Lexus RC300 Bulb Sizes Change Over the Years?
The Lexus RC300 has maintained consistent bulb sizes across all model years from 2016 to 2019. The low beam has used a LED Headlights bulb throughout, which means replacement parts and LED upgrade kits are widely available and well-tested for this model. If you find a deal on bulbs for any RC300 year in this range, they will fit your 2018 model.