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SKU: 7443-Res-W

7440/7443 White CANBUS LED With Built-in Resistors No Error Codes (PAIR)

Sale price $64.99 Regular price $69.99

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  • Direct replacement for 7440/7443 applications, including turn signals, reverse lights, parking lights, and daytime running lights
  • Built-in resistor on the turn signal filament helps prevent hyper-flashing and error codes
  • Full metal heatsinking with a built-in silent fan for cooling
  • CANBUS, nonpolar, and CK-compatible electrical design
  • Plug-and-play installation with no external resistors required
  • 1200 lumens per bulb
  • 1-Year Warranty

7440/7443 White CANBUS LED Bulbs | 300% Brighter | No Hyperflash

Underground Lighting 7440 and 7443 LED bulbs are designed for compatible vehicles using 7440 or 7443 sockets. The CANBUS-compatible electrical design with a built-in resistor allows the turn signal bulb to operate normally without any signs of hyperflash.

The resistor is installed only on the turn signal filament. It is not placed across both filaments. This reduces unnecessary heat during normal operation. A built-in cooling fan activates when the turn signal is operating, while the full metal construction helps move heat away from the bulb.

The design is also nonpolar and CANBUS compatible. This gives the bulb flexibility across different socket configurations without extra wiring or modification.

CANBUS LED With Built-in Resistor

Replacing turn signal 7440/7443 halogen lights with LEDs can cause the turn signal bulb to flash too fast. This is because LEDs draw significantly less current than halogen lights. This load difference creates flickering and warning messages on the vehicle's dashboard.

Our 7443 CANBUS LED bulb uses an integrated resistor for the turn signal circuit. This eliminates flickering and error messages without needing an external load resistor.

The CANBUS design, nonpolar operation, and CK compatibility are built in. The cooling system is also designed around the resistor, with the fan activating when the turn signal is operating.

Bright White LED Output for Exterior Lighting

The white LED design is suited to applications where a white replacement is required, including reverse lights, parking lights, daytime running lights, and compatible turn-signal applications.

Each bulb uses 54 SMD LEDs arranged around the bulb to distribute light through a 360-degree pattern. Compared to halogen, which only delivers 300 to 400 lumens per bulb, ours delivers 1200 lumens per bulb, giving the factory housing a stronger white LED source than the original incandescent bulb.

Designed Around the 7440/7443 Application

The 7440/7443 bulb family is used across a range of vehicle lighting applications, including reverse, parking, daytime running, and turn signal positions. The correct bulb depends on the socket and lighting function used by your vehicle.

This replacement is built for both 7440 and 7443 applications, making it suitable for vehicles that use either bulb number. Check your factory bulb number before ordering to confirm the correct application for your vehicle.

Installation

Difficulty Level: Beginner - Simple Installation for anyone.

Installation takes approximately 10 minutes. The bulb installs as a plug-and-play replacement with no slicing, complicated wiring, or external resistors required.

Works for 99.9% of vehicles.

CA Residents: WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov

Do you have any questions about the application, installation, shipping, warranty, or more? Do not hesitate to reach out to Underground Lighting and talk to a specialist. Chat with us online by hitting the chat button or call us at (561) 918-5225. We are here to help!

WHAT'S INCLUDED

BULBS :
2X White Canbus LEDs With built in resistors
WARRANTY :
1 Year Warranty

PRODUCT INFORMATION

Function: Turn Signal, Reverse Light, Parking Light, Daytime Running Light

LED Chips: 54 SMD white LEDs

Beam Angle: 360-degree

Color: White

Cooling System: Silent built-in fan + full metal heatsinking

Electrical Design: CANBUS, non-polar, CK compatible

Voltage: 12V

Installation: Plug-and-play

Resistor Design: Built-in resistor on turn signal filament

Blinker Circuits: No Resistors Required

Output: 1200 lumens per bulb

Application: 7440/7443

Vehicle Coverage: Works with 99.9% of vehicles

TECH SPECS

WATTAGE :
24W
LENGTH :
2.4"
DIAMETER :
0.83"
INTENSITY :
1200lm
BLINKER CIRCUITS :
No Resistors Required
CIRCUITS :
12V
This product has a 1 Year Warranty

Although both 7440 and 7443 bulbs share the same physical T20 wedge shape and fit into many of the same vehicle light sockets, they are not the same. 7440 is a single-function, single-circuit bulb, while 7443 is a dual-function bulb with two circuits. A 7443 can replace a 7440 when the application only uses one circuit, but a 7440 cannot replace a 7443 where two lighting functions are required. Read our 7443 vs 7440 LED bulbs guide for a detailed explanation of the differences and applications.

This 7440/7443 White CANBUS LED bulb pair is $64.99. The pair includes two white CANBUS LED bulbs with built-in resistors. A 1-year warranty is also included.

Fitment varies by vehicle year, make, model, lighting function, socket, and factory bulb number. This 7440/7443 bulb is compatible with applications that use the supported bulb numbers, but the correct fit depends on how the vehicle's socket is configured.

This bulb fits compatible 7440 and 7443 applications, with cross-compatibility including 7441, 992, 7440, 7440ST, 7440AL, 7440LL, 7440A, W21W, 7444NA, 7443, 7443ST, and 7443LL.

Before ordering, check your factory bulb number and the lighting function of the socket. For more details on the difference between 7440 and 7443 and when they can be used interchangeably, see our 7443 vs 7440 LED bulbs guide.

COMPATIBILITY

CROSS-COMPATIBILITY :
7441, 992, 7440, 7440ST, 7440AL, 7440LL, 7440A, W21W, 7440, 7444NA, 7443, 7443ST, 7443LL
FITMENTS :
Reverse Light/ Back Up
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  • 5 stars: 10 (91%)
  • 4 stars: 0 (0%)
  • 3 stars: 1 (9%)
  • 2 stars: 0 (0%)
  • 1 star: 0 (0%)
S
Shawn Mills
Finally a bulb that doesn't drain my battery

I've tried so many different brands of LEDs for different areas of my 15 Impala LTZ. Some bulbs are stock LED and other halogens. This bulb was the answer to my reverse bulbs. Fast shipping. Only thing I wish they were a little brighter but I believe that's because the LEDS are on the side and not rear of bulb

J
Jerry Erazo
Excellent customer service!!!!

Sales agent was very helpful and patient with me,,,on all my questions I asked him on my vehicle!!!

G
Gusti
Great 👍 💯 golf r mk7

Great 👍 💯 recommend!!!

B
Bernard

Shipped to me quick and definitely a big upgrad to my reverse lights.

N
Nicholas Uglow
Fiat 500 DRL Issues

Was really excited for these lights as I successfully changed my brake lights to UnderGround Lighting LED's. After around 30 minutes of driving I got an error code on the dash, I assume an overheating. I just turned off my running lights, but was mildly upset. I really wish these would've worked, but This car does tend to be a touch bit sensitive so I'm not too disappointed they didn't work.

J
Jonathan Twiford
2024 Dodge Tradesman

All the lights were switched to LED lights using these products without much of an issue. There were a couple we had to wiggle in, but otherwise, works great!

T
Ted Slezak
Upgrade with no downside.

The CANBUS LEDs provided enough resistance to keep the turn signals from hyper flashing and were much brighter than the original bulbs. They installed easily. I’m satisfied with the results.

B
Brian DZIEDZIC

Very satisfied with the back up bulbs

O
Orlando Tosado

7440/7443 White Canbus LED W/ Built in Resistors No Error Codes (PAIR)

C
Conrad MacKenzie
Fantastic Product and Service

7440/7443 White Canbus LED W/ Built in Resistors No Error Codes (PAIR)

G
Gary Sweet
Sweetadventure tail lights

Nice a lot brighter than the standard bulbs.

J
John

What the color temperature for this bulbs?

Underground Lighting

6000k

J
James

I’m looking for 7440 only bulb, that will fit on a 2013 fiat 500 abarth. No dual function as this 7440 bulb only has one filament. Will this work? Part number is 7443-Res-W

Underground Lighting

Yes these will work in a 7440 socket as a single filment.