What Size Bulbs Does a 2015 Lexus GS450h Use?
Correct headlight, fog light, and tail light bulb sizes. Sourced from OEM catalog data.
Installation Difficulty
Easy (Plug and Play)
Est. Replacement Cost
$15 - $40 (Halogen) / $30+ (LED)
What Lighting System Does the 2015 Lexus GS450h Have?
The 2015 Lexus GS450h features an extensive lighting system with 13 bulb positions. It uses factory LED technology with integrated LED headlight modules. The GS450h has been available from 2007 to 2018, and the 2015 model falls in the mid-generation years.
Can You Put LED Bulbs in a 2015 Lexus GS450h?
Upgrading the 2015 Lexus GS450h 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 H16 LED LED bulb provides a clean white output that pairs well with LED headlights.
How to Replace Bulbs on a 2015 Lexus GS450h
To remove the headlight bulb, disconnect the wiring harness, then twist the bulb counter-clockwise and pull it straight out of the housing. Older model years like the 2015 GS450h typically offer easy access to the headlight bulbs from behind the headlight assembly under the hood. Most owners can complete the swap in under 10 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 H16 LED fog light socket.
Full Upgrade Bundle
Upgrade All 13 Positions at Once
2015 Lexus GS450h Complete Bulb Size Chart
| Position | Bulb Size | Shop |
|---|---|---|
Low Beam | LED Headlights | Buy LED Headlights |
High Beam | LED Headlights | Buy LED Headlights |
Fog Light | H16 LED | Buy H16 LED |
Brake Light | LED Bulb | Buy LED Bulb |
Turn Signal Front | 7444NA LED | Buy 7444NA LED |
Side Marker | LED Bulb | Buy LED Bulb |
Turn Signal Rear | 7440 LED | Buy 7440 LED |
Reverse Light | 921 | Buy 921 |
Dome Light | LED Bulb | Buy LED Bulb |
License Plate | LED Bulb | Buy LED Bulb |
Map Light | LED Bulb | Buy LED Bulb |
Parking Light | 7444NA | Buy 7444NA |
Trunk Light | 194 | Buy 194 |
Want to upgrade everything at once?
Shop Complete LED Kit for 2015 Lexus GS450hHow Long Do 2015 Lexus GS450h Headlight Bulbs Last?
Factory LED headlights on the 2015 Lexus GS450h 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 11 years old, the original bulbs on your GS450h 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 2015 Lexus GS450h?
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.
2015 Lexus GS450h Headlight FAQ
Did Lexus GS450h Bulb Sizes Change Over the Years?
Over its production run from 2007 to 2018, the Lexus GS450h has seen bulb size changes in the Low Beam, High Beam and Fog Light positions. The 2015 model uses the earlier bulb specification that was in place before the change around 2016. Always verify the exact bulb size for your specific 2015 model year using the chart above, as using the wrong size can result in poor fitment or reduced light output.