2018 Lexus IS 300 Bulb Size

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Bulbs Chart

Stepwell Light Bulb - 194

Trunk or Cargo Area Light - 168

Interior Door Light Bulb - 168


2018 Lexus IS 300 Stepwell Light Bulb (194)

    LED Lights

  • Best Overall

    Philips 127916000KB2

    Vision LED lights last 12 year. First to market with proven street-legal exterior LEDs.  Philips Vision LEDs are available for brake and taillights, back-up lights, dome lights, glove compartment lights, trunk lights, and license plate lights.
  • 8000K Warm White

    Pack of 2 Xtreme Vision 360 X treme Ultinon

    - Fittings: Philips led Bulb Fits in W5W, 194, 168 - 360° Light Diffusion - Philips LED exterior lighting range is designed for a smarter light distribution to ensure that exterior signaling light is projected where you need it (whether that’s reversing, stopping, or signaling). With wide angle and uniform light diffusion, not only can you
  • For Car Dome, Map Door, Courtesy, License Plate Lights

    Marsauto LED Light Bulb 6000K Replacement Bulbs

    These bulbs could fit most of the positions of the car but do not fit all positions of your car, according to the year and model of your car, please double check the owner's manual. For some vehicles, It may need a canbus decoder to fix flickering or error code

See more 194 LED Lights

2018 Lexus IS 300 Trunk or Cargo Area Light (168)

    Halogen Lights

  • Premium Pick

    PIAA Xtreme White Plus High Performance

    The Xtreme White Plus Series of high output replacement bulbs give drivers better color recognition, depth perception, and improved contrast over stock halogen bulbs, all while meeting DOT specification. Xtreme White Plus bulbs feature a crisp white light output that allows for better road illumination, while a blue top coat

See more 168 Halogen Lights

    LED Lights

  • For Car Dome, Map Door, Courtesy, License Plate Lights

    Marsauto LED Light Bulb 6000K Replacement Bulbs

    No polarity no flip: it is truly no polarity, can light on two sides, no need more modification or flip, plug and play, easy install within 5 minutes.
  • Inexpensive But Reliable

    Diode Dynamics HP3 LED Bulbs

    Design. The 194 HP3 LED bulb is a compact, simple LED replacement with proven performance. The single diffused optic spreads light in the original lamp, for OEM-style appearance and function. With its dual-lead contacts, it will fit snugly in the socket, and its light weight means it won't vibrate loose over...
  • Extremely Bright

    iBrightstar T10 168 LED Bulbs

    Product benefits:  Non-polarity design, 500% brighter than original halogen bulb, aircraft grade aluminum heat sink with Low temperature for Longer life span & Low Power Consumption (Up to 50,000 Hours Service Life).

See more 168 LED Lights

2018 Lexus IS 300 Interior Door Light Bulb (168)

    Halogen Lights

  • Premium Pick

    PIAA Xtreme White Plus High Performance

    The Xtreme White Plus Series of high output replacement bulbs give drivers better color recognition, depth perception, and improved contrast over stock halogen bulbs, all while meeting DOT specification. Xtreme White Plus bulbs feature a crisp white light output that allows for better road illumination, while a blue top coat

See more 168 Halogen Lights

    LED Lights

  • For Car Dome, Map Door, Courtesy, License Plate Lights

    Marsauto LED Light Bulb 6000K Replacement Bulbs

    No polarity no flip: it is truly no polarity, can light on two sides, no need more modification or flip, plug and play, easy install within 5 minutes.
  • Inexpensive But Reliable

    Diode Dynamics HP3 LED Bulbs

    Design. The 194 HP3 LED bulb is a compact, simple LED replacement with proven performance. The single diffused optic spreads light in the original lamp, for OEM-style appearance and function. With its dual-lead contacts, it will fit snugly in the socket, and its light weight means it won't vibrate loose over...
  • Extremely Bright

    iBrightstar T10 168 LED Bulbs

    Product benefits:  Non-polarity design, 500% brighter than original halogen bulb, aircraft grade aluminum heat sink with Low temperature for Longer life span & Low Power Consumption (Up to 50,000 Hours Service Life).

See more 168 LED Lights

Lexus IS 300 Bulb Size By Years

Misconception: many people think any replacement bulb will fit their car, so swapping one from the store seems fine. That makes sense because bulbs look similar and packaging is confusing, but that mental model leads to wrong replacements or extra trips. What is true: this bulb size chart lists the correct bulbs for the 2018 Lexus IS300 by function—head, high beam, turn, brake, reverse, and interior. Think of it as a quick reference that saves time and helps you pick compatible sizes and types. A simple rule of thumb is to match the socket and wattage, not just the shape. Implications and quick recap: use the chart to avoid fit and lighting issues, and test a new bulb before final reassembly. Quick tests are swapping with a known good bulb or checking continuity. Note: links on this page may be affiliate links, which means I might earn a small commission if you buy through them, at no extra cost to you.

2018 Lexus IS 300 specs
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