What Size Bulbs Does a 2010 Lexus IS350C Use?
Correct headlight, fog light, and tail light bulb sizes. Sourced from OEM catalog data.
Installation Difficulty
Easy (Plug and Play)
Est. Replacement Cost
$50 - $150 (HID System)
What Lighting System Does the 2010 Lexus IS350C Have?
The 2010 Lexus IS350C features an extensive lighting system with 12 bulb positions. It uses factory HID/Xenon technology with D4S projector headlights. The IS350C has been available from 2010 to 2011, and the 2010 model falls in the early-generation years.
Can You Put LED Bulbs in a 2010 Lexus IS350C?
The 2010 Lexus IS350C comes equipped with factory D4S HID/Xenon headlights. These already produce significantly more light than halogen bulbs, so upgrading is generally unnecessary. When your HID bulbs burn out, replace them with OEM-spec D4S HID bulbs to maintain the correct color temperature and beam pattern. Avoid cheap aftermarket HID bulbs as they can produce incorrect beam patterns and blind oncoming drivers. Your fog lights use a 9005 LED halogen bulb, which can be upgraded to LED for a whiter color match with your HID headlights.
How to Replace Bulbs on a 2010 Lexus IS350C
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 2010 IS350C 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. HID headlights operate at high voltage. Always disconnect the battery before working on the headlight assembly. Never touch the HID ballast while the headlights are on, and handle the D4S capsule with gloves to avoid oil contamination. 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 9005 LED fog light socket.
Full Upgrade Bundle
Upgrade All 12 Positions at Once
2010 Lexus IS350C Complete Bulb Size Chart
| Position | Bulb Size | Shop |
|---|---|---|
Low Beam | HID-D4S LED | Buy HID-D4S LED |
High Beam | 9005 LED | Buy 9005 LED |
Fog Light | 9005 LED | Buy 9005 LED |
Brake Light | LED Bulb | Buy LED Bulb |
Turn Signal Front | 7440NA LED | Buy 7440NA LED |
Side Marker | LED Bulb | Buy LED Bulb |
Turn Signal Rear | 7440NA LED | Buy 7440NA LED |
Reverse Light | 921 | Buy 921 |
License Plate | 168 | Buy 168 |
Map Light | 168 | Buy 168 |
Parking Light | 168 | Buy 168 |
Trunk Light | DE3022 | Buy DE3022 |
Want to upgrade everything at once?
Shop Complete LED Kit for 2010 Lexus IS350CHow Long Do 2010 Lexus IS350C Headlight Bulbs Last?
HID/Xenon headlights on the 2010 Lexus IS350C typically last 2,000 to 3,000 hours, or about 4 to 6 years of regular driving. As HID bulbs age, they shift color toward pink or purple, which is a clear sign that replacement is needed. Flickering on startup also indicates a worn bulb or failing ballast. At 16 years old, the original bulbs on your IS350C are likely overdue for replacement. 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 2010 Lexus IS350C?
For the high beams, the 9005 is interchangeable with HB3. 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.
2010 Lexus IS350C Headlight FAQ
Did Lexus IS350C Bulb Sizes Change Over the Years?
The Lexus IS350C has maintained consistent bulb sizes across all model years from 2010 to 2011. The low beam has used a HID-D4S LED 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 IS350C year in this range, they will fit your 2010 model.
Other IS350C Years
More from Lexus
Other Vehicles That Use HID-D4S LED Bulbs
These vehicles from other makes also use a HID-D4S LED low beam bulb: