4257 LED Turn Signal Bulbs CanBus-Ready Switchback | T3 Series

Model No: T3-4257D
$64.99 $69.99

Important Notice:

For a 2022~2025 Ford Maverick Lariat, since the factory DRL is already LED, it is not able to use a switchback function, so the correct turn signal is T3-4257A only in amber light.

Notice

More Options For Your Vehicle :

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Specifications

  • Wattage

    24W/bulb(max)
  • Lumens

    2000LM/bulb(max)

Warranty & Return

Warranty:
1-year hassle-free warranty
*Warranty does NOT cover labor, diagnostics, towing, rental car, or any other expense related to an item being defective/damaged.

Return:
45 days free return and money back
90 days free return and money back for Lasfit club member.

Shipping:
FREE U.S. shipping on all orders.
We ship the item via USPS for fast and reliable delivery.

Support:
Customer support team in United States
Lifetime installation support

 T3 Series Switchback LED 4257 Bulbs – Turn Signal Light with Can-Bus Decoder

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 T3 Series Switchback LED 4257 Bulbs – Turn Signal Light with Can-Bus Decoder

Why Do You Need Lasfit Switchback 4257 LED Turn Signal Lights?

In 2025, Lasfit redefines turn signal performance with the T3 LED bulbs. Featuring a built-in CanBus decoder, these bulbs eliminate annoying hyper flash and error codes—no external resistors required. Equipped with high-output 3030 SMD LED chips, the T3 bulbs deliver brightness levels far beyond traditional halogen lights.
What’s more, the switchback function provides a crisp 6000K white for parking lights and a vivid 3000K amber for turn signals—all from a single bulb. It's a smarter, brighter, and safer way to upgrade your vehicle lighting in one simple step.


Key Features of Lasfit Switchback 4257 Turn Signal Bulbs

  • Error-Free Performance with Built-in Decoder
    Tired of hyper flash and dashboard warning lights after installing LED bulbs? The T3 series solves this problem with a ceramic resistor built directly into the bulb, eliminating the need for external resistors. That means easier installation, lower costs, and a cleaner setup—just plug and play.
  • Ultra-Bright Output with 20 SMD LED Chips
    Struggling with dim halogen lights? Each T3 bulb packs 20 high-powered 3030 SMD LEDs and delivers up to 2000 lumens per bulb with a 24W output—providing maximum visibility for safer lane changes and turns, day or night.
  • Quick, Hassle-Free Installation
    Thanks to their compact size and halogen-like dimensions, T3 LED bulbs are a breeze to install. Just twist out your stock halogen bulb, insert the T3 LED bulb, and you're done—no extra resistors, no special tools, and no stress.
  • Built to Last – Intelligent Cooling System
    Durability meets design. T3 bulbs feature a full aluminum body, 8 heat dissipation hole, and a smart temperature control chip to prevent overheating. This advanced thermal management system extends the lifespan of your bulbs, ensuring they stay bright for years of daily driving and adventure.

-Product Spec-

  • Product: T3-4257D
  • Package Includes: 2 Bulbs
  • Fit Size: 4257 / 4257NA / 4257NALL /4 257NAK / 4257A
  • Installation Position: Front Turn Signal Light
  • Wattage: 24W/bulb(max)
  • Lumens: 2000LM/bulb(max)
  • Color: Bright Amber / White
  • LED Chips: 20PCS 3030 high-intensity LED Chips(16 PCS for amber color and 4 PCS for white color)
  • Socket: standard socket

-FAQs: Everything You Need to Know About T3 LED Bulbs-


Q1: What’s the difference between T-Series and T3-Series turn signal lights?

Brightness: T3-Series offers optimized brightness to prevent blinding oncoming drivers.
Decoding: New resistor for longer, more efficient decoding.
Lifespan: T3-Series has a heat filter for better heat dissipation and longer life.
There are more details on the differences between the T series and the T3 series.

Customer Reviews

Based on 51 reviews
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R
R.A.
2023 ford maverick xlt

I put t3 switch backs in my maverick and they are amazing! I really like these lights, the day time running light looks so much better with the white light compared to the dim amber. And the new blinker definitely make people more aware. Apsoulty love them! So much better then the factory halogen. Never had a problem with hyper flash, even tested it out letting it blink away at a long red light and it never hyper flashed. These are great light! They look great the phone camera wouldn't focus on the lights at night, looks great in person.

R
Ryan S
2023 Maverick LT

Took literal seconds to install and immediately love them. Clean, modern look and they're so much better as DRL than the crusty halogen junk that comes stock. Nobody is going to miss that I'm turning now.
Highly recommend.

J
Jason

Perfect fit and one of the best upgrades I have made for my Maverick.

M
Mike Wild
Ford Maverick 2024

Great lights, great price. Good customer service as had an error with address and they helped correct it.

W
William Young
24 Maverick Hybrid

Bulbs fit perfectly and were easy to install. Made a big difference in front visibility

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