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4257: XB LED Bulbs (Resistor-Free)

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Brand: Morimoto




PART #: 1 x LED417

*Guaranteed Fitment
Easy Return


Introducing the 4257 Morimoto XB LED Bulbs, the latest innovation in automotive lighting for 2023. These LED bulbs are designed to upgrade your vehicle's turn signals, parking lights, brake lights, and tail lights with unbeatable brightness and performance. With 30 watts of power, they provide exceptional illumination, enhancing both style and safety on the road. One standout feature is their resistor-free design, ensuring they won't cause hyper-flashing issues in your turn signals. Unlike other "resistor-free" LED bulbs on the market, these maintain their brightness and reliability for over 30 minutes without overheating. They are also compatible with both CK and non-CK circuits, simplifying the buying process. Moreover, these bulbs incorporate effective heat management technology, preventing overheating and ensuring the longevity of critical components. Upgrade your vehicle's lighting with Morimoto's 4257 XB LED Bulbs, the future of plug-and-play LED lighting solutions.


  • Brightness: 30W power for brilliant illumination in turn signals, parking, brake, and tail lights.
  • Resistor-Free: Prevents hyper-flashing without extra components, ensuring consistent performance.
  • Compatibility: Works with both CK and non-CK circuits, simplifying your buying decision.
  • Heat Management: Integrated fan keeps vital components cool for long-lasting reliability.
  • 2023 Innovation: The latest in LED technology for a brighter, safer drive.


  • LED Bulbs: 2x (One Pair) 4257 Morimoto XB LED Bulbs


This Morimoto product includes a 2 Year limited warranty, serviced and supported by the Morimoto team in Atlanta, GA. This warranty does not cover modifications, alterations, or misuse. For additional information, Click Here.


  • Voltage Range: 10-18V DC

  • Current: 2.3A @ 13V DC

  • Luminosity: 1,680lm (raw, each)

  • Wattage: 30W

  • LED Chip Count: 52x 3030SMD

  • Lifespan: 2000 hours



  • Cross Compatibility: 4257

  • CIRCUITS: CK and Non-CK Specific

  • FITMENT: Signal, Parking, Brake, Tail, and Reverse Lights

  • TURN SIGNALS: No need for extra resistors (hyperflash-free)

  • NOTE: Not Compatible with PWM DRLs


Let's Face it: So many modern vehicles are still using incandescent bulbs in their turn signals, parking lights and brake lights that the world just isn't quite ready to move on from plug n play LED Bulbs. Despite that, the category has been stagnant for years with little to no real innovation or upgrades... until now. The new XB LED Bulbs are a much-needed refresh in this category and are all new for 2023!

Unbeatably Bright: The 4257 XB LED bulbs are great for turn signals, parking lights, brake lights, and tail lights, brake, and tail lights. With 30w of power, they are incredibly bright too, making for an instant upgrade in performance, style, and safety no matter where you put them to use.

Resistor-Free: The XB LED bulbs do not need any extra resistors and they won't cause any hyper-flashing on your turn signals either! Unlike other "resistor-free" LED bulbs that have been on the market for a while now that dim down and start hyper-flashing within a minute or two, these will maintain their resistor-free nature AND their intensity for well over 30 minutes, all without any overheating or reliability issues.

CK or Non-CK: These bulbs are conveniently compatible with both CK and non-CK Circuits, so there's no need to take a multi-meter and a friend out to your truck just to ensure you're buying the right version. The electronic system is universal for both.

Heat Management: is crucial for reliability when it comes to anything LED. High wattage means high surface temperatures, but the integrated fan works well to keep hot air away from the internal cavity of the bulb. The XB LED Bulbs do a great job at keeping the critical components such as the circuit board and LED chips cool, and therefore reliable.

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