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4257 4257NA CANBUS Error Free LED Turn Signal Light Anti Hyper Flash | Amber Yellow, 2 Bulbs


SKU: RTS7474086084855




1. Compatible with 2019-2021 Ford F-150, for front turn signal light.

2. Compatible with 2021+ Ford F-250/F-350, for front turn signal light.

3. Compatible with 2022 Ford Maverick Lariat, for front turn signal light.

4. Replace factory halogen 4257 4257NA bulbs. 


-Key Features-

Built-in CANBUS System

We know, for 2019-2021 Ford F-150, 2021+ F-250/F-250 trucks, and 2022 Ford Maverick Lariat, they have 4257 factory front turn signal light bulbs in the socket. There are not too many aftermarket 4257NA LED bulbs options in the market. They don’t have CANBUS system to anti hyper flash issue even though you finally find the 4257 LED bulbs replacement.

Now, there is a good solution to abandon annoying resistor decoders. Our new version CANBUS 4257 will meet your need. LASFIT is the first brand on the market to publish built-in CANBUS Amber LED turn signal lights, when most products of LED are not canbus error free on the automotive aftermarket. We are confident that these bulbs would give you an extraordinary driving experience!

Directly Plug and Play
CANBUS system can prevent 90% hyper flash and error warning. No need to add extra resistors or parts anymore. They are designed to directly plug and play.

Brightest LED Turn Signal Light

The brightness will be reached 12W per bulb. It’s the brightest LED turn signal light in the market.

Dual Brightness Function
Upgrade function for switchback coming with the brighter mode for turn signal light and the normal mode for DRL/driving indicator.

Intelligent Temperature Control (ITC)
An excellent Intelligent Temperature Control system will protect bulbs against excessive current and overheating and ensure a longer lifespan.

Safety Protection
Built-in MINI fuses to protect the bulbs and your cars against the instantaneous high current. Safer installation and use.

Worry-Free Warranty
We provide 45 days money-back guarantee, 1-year hassle free warranty, friendly customer service, and U.S. local customer support.



Product: T-4257D
Fit Size: 4257 / 4257NA / 4257NALL / 4257NAK / 4257A
Installation Position: Front Turn Signal Light
Wattage: 24W/bulb(max)
Lumens: 1600LM/bulb(max)
Color: Bright Amber/ Dim Amber
LED Chips: 32pcs SMD 3030 LED Chips (24pcs for Bright Amber, 8pcs for Dim Amber)
Socket: Standard socket


1. These bulbs are polarity sensitive. If the LED does not light up after inserting, simply remove it, flip the direction and reinstall.
2. Since these bulbs built-in Intelligent Temperature Control, if you use them for a long time (a few vehicles maybe 2-5 minutes, it depends on year/make/model and temperature) may happen hyper flash, please turn off and cool 1-2 minutes, they will work normally again.
3. Warranty does NOT cover labor, diagnostics, towing, rental car, or any other expense related to an item being defective/damaged.


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