Lexus IS: Bulb Replacement Guide
Got a blown bulb? Check out this visual guide for the correct sizes, wattage, and type.
This article applies to the Lexus IS (2005-2013).
There are so many lights on the Lexus IS that it can be hard to know what kind of bulb is needed when one goes out. Knowing the type of bulb and the wattage required makes fixing blown bulbs a far less stressful (and less expensive) option. The table below contains an organized list of the type of bulbs in a typical Lexus IS, along with their necessary wattage.
| Light Bulbs | Bulb # | W | Type |
|---|---|---|---|
| Headlights - High Beam | 90005 | 60 | HB3 Halogen Bulb |
| Headlights - Low/High Beam | D4S | 35 | D4S Discharge Bulb |
| Headlights - Low Beam | H11 | 55 | H11 Halogen Bulb |
| Front Turn Signal | 7440A | 21 | Wedge Base Bulb (Orange) |
| Parking Lights | 194/168 | 5 | Wedge Base Bulb (Clear) |
| Front Fog Lights | H11 | 55 | H11 Halogen Bulb |
| Rear Turn Signal | 7440A | 21 | Wedge Base Bulb (Orange) |
| Back-Up Lights | 921 | 16 | Wedge Base Bulb |
| Puddle Lights | 194/168 | 5 | Wedge Base Bulb (Flank Style) |
| Vanity Lights | 194/168 | 8 | Wedge Base Bulb (Flank Style) |
| Trunk Light | DE3022 | 5 | Double End Bulbs |
| Interior Lights - Front | 194/168 | 5 | Wedge Base Bulb (Forward Style) |
| Interior Lights - Rear | DE3021 | 3 | Double End Bulbs |
| Dome Lights | DE3021 | 3 | Double End Bulbs |
| Front Door Lights | 194/168 | 3.8 | Wedge Base Bulb (Flank Style) |
Exterior Bulbs
The only real variation in exterior lighting on the Lexus IS is in the headlights. Halogens, Bi-xenon, and even LED bulbs are available. They are not, however, interchangeable. Lexus models with halogen headlights will need two different bulbs for the high and low beams. Cars equipped with HID's only need the one bulb.
Figure 1. HB3/9005 (halogen). 
Figure 3. H11 (halogen). 
Figure 2. D4S (bi-xenon). 
Figure 4. 7440A.
Wedge Based Bulbs
The interior lights of are almost entirely wedge based bulbs. The lights from factory are normal units with filaments, but they can be exchanged for LEDs like the ones below. LEDs are brighter and have and extremely long life. The numbering for the bulbs is interchangable between LED and halogen, but the the type of bulb required is more complicated. LED's provide light in one direction unlike a typical light bulb. They compensate for that limitation by coming in a variety of different styles.
Figure 5. 921 Wide Angle LED 
Figure 6. 194/168 Flank Style LED 
Figure 7. DE3021 Festoon Style LED 
Figure 8. 194/168 Forward Style LED
Related Discussion
- LED Replacement Guide - ClubLexus.com
