What Size Bulbs Does a 2021 Toyota Avalon 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 Toyota Avalon Have?
The 2021 Toyota Avalon features an extensive lighting system with 13 bulb positions. It uses factory LED technology with integrated LED headlight modules. The Avalon has been available from 1995 to 2022, and the 2021 model falls in the late-generation years.
Can You Put LED Bulbs in a 2021 Toyota Avalon?
Upgrading the 2021 Toyota Avalon 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 2021 Toyota Avalon
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 2021 Avalon, 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 13 Positions at Once
2021 Toyota Avalon 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 |
Turn Signal Front | LED Bulb | Buy LED Bulb |
Turn Signal Rear | LED Bulb | Buy LED Bulb |
Reverse Light | LED Bulb | Buy LED Bulb |
Dome Light | LED Bulb | Buy LED Bulb |
Side Marker | LED Bulb | Buy LED Bulb |
License Plate | LED Bulb | Buy LED Bulb |
Map Light | 168 | Buy 168 |
Parking Light | LED Bulb | Buy LED Bulb |
Trunk Light | 168 | Buy 168 |
Want to upgrade everything at once?
Shop Complete LED Kit for 2021 Toyota AvalonHow Long Do 2021 Toyota Avalon Headlight Bulbs Last?
Factory LED headlights on the 2021 Toyota Avalon 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 5 years old, your Avalon is approaching the typical replacement window. Inspect your headlights at night and compare brightness between the left and right sides. 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 2021 Toyota Avalon?
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.
2021 Toyota Avalon Headlight FAQ
Did Toyota Avalon Bulb Sizes Change Over the Years?
Over its production run from 1995 to 2022, the Toyota Avalon has seen bulb size changes in the Low Beam, High Beam and Fog Light positions. The 2021 model uses the newer bulb specification introduced around 2019. Always verify the exact bulb size for your specific 2021 model year using the chart above, as using the wrong size can result in poor fitment or reduced light output.