7443 vs 7440 – Which One is Better for Your Car?

Do you want to buy any of the bulbs mentioned above but need clarification on their differences?

In this post, we will look at the features of turn signal bulbs 7440 and 7443. These two bulbs are frequently interchangeable because of their similar naming schemes and application situations. However, a few peculiarities make each turn signal bulb better suited for specific purposes.

The main difference between 7443 and 7440 is that 7443 bulbs have two filaments, whereas 7440 bulbs only have one filament.

Although rear turning indicator lights use 7440 bulbs, frontal turning indicator lights use 7443s. Let us use our comprehensive understanding of bulbs to help you determine the ideal choice for your requirements.

Features of 7443 Bulb

An LED 7443 bulb is a specialized fit. Also, traditional bulbs are less efficient than LED bulbs. The following are some of the features of LED lighting.

  • Increased Efficiency

Although LED light bulbs emit less heat, these can be up to 90% more efficient than other standard bulbs. LED lights are also brighter, making them a good choice for automobiles, especially during night travel.

  • Long-Lasting

LED bulbs last longer since they use less energy. As a result, they may be a more cost-effective solution.

  • Improved Appearance

LED bulbs are often white, which some consider preferable to classic yellow. Even if your car did not have LED lights, you might easily upgrade them to reap the benefits of a pleasing white light.

7443 Bulb Types

LED 7443 Bulbs Come in different varieties. There are several LED 7443 bulbs to choose from, which are as follows.

  • Reverse Light for Backup

AUXITO 2600 Lumen output 7440 7443 LED Bulbs are created solely for your reverse lights. These bulbs look like halogen lighting and use a fraction of regular reverse lights’ energy.

  • Projector Lens Illumination

A projection lens beam is identical to a reflective headlight but has a lightbulb inside the steel shell that reflects light. It results in a brighter lens, which improves visibility. The BENEBOLT 7440 7443 LED Bulb 3600 Lumen output White LED Light provides a robust and glare-free light.

  • LEDs with Different Colors

Choose colorful LEDs to add a specific design component to your car. The Online 7443 7440 LED Bulbs are a vibrant red color that will help you stand out from the pack. Taillights, turn signals, parking lights, side marker lights, and even turn signal lights can have these specialized colors.

  • LEDs in a Classic Colour

Orange and Amber yellow LEDs offer better efficiency. The Bright star Latest 9-30V Future Is going Low Power LED Bulbs come in a pair and are 300% brighter than standard halogen light.

Features of 7440 Bulb

These are the following features of the 7440 bulb.

  • The 7440 are single filament bulbs.
  • These bulbs are ideal for rear turn signal lights.
  • They can also function as reverse lights in some sedans.
  • You cannot put these bulbs into a 7443 socket.
  • The light will stay lit if you turn on your headlights.

What’s the difference between 7440 and 7443 bulb?

7443 vs 7440

Below we mention the comparisons of 7440 and 7443 car light bulb characteristics.

  • Filaments and Illumination

The filaments of these two bulbs are the first thing you’ll notice. Because 7440 bulbs have only one filament and 7443 bulbs have two, the 7443 bulb provides somewhat higher illumination due to the extra filament.

  • Typical Use Case

These two bulbs have opposite applications. 7440 bulbs are used for rear turn signal lights, whereas 7443 are best for front turn signal lights.

  • Additional Use Cases

In some sedans, you can also use 7440 bulbs as reversing lights and turn signals. You can utilize 7443 bulbs in parking lights. Since 7440 bulbs are less bright, they can be safe reverse lights. The 7443 bulbs have higher brightness and can be better front parking lights.

  • Nature of the Bulb

Both bulbs behave differently based on driver input, and you can use them in turn signal configuration settings. When you use 7440 bulbs, they will stay lit even when car headlights are on.

On the other hand, 7440 bulbs only brighten up when you use your turn signals. Because of its intermittent flashing, 7443 lights have a benefit over 7440 bulbs when utilized as turn indicator bulbs.

  • Interchangeability

The best question today is whether you can use these two bulbs interchangeably. Because of the specific sizes and shapes, you can put a 7443 lightbulb into a 7440 socket.

However, a 7440 bulb will not fit into a 7443 socket. If your automobile requires a 7440 bulb, you’ll be better off utilizing a 7443 bulb with some minor bulb base and connector adjustments. Thus, you can purchase only one bulb.

What to Look for When Buying an LED 7443 Bulb?

When picking the correct LED bulbs, the size of your lights is crucial. You’ll need a set of lightbulbs compatible with your car’s specific model. You can usually find this information in your user manual.

You can consider the price and manufacturer while selecting the best LED 7443 bulbs. LED bulbs are frequently inexpensive. So, you can choose a pair of high-quality and affordable bulbs. Previous customer reviews can also tell you a lot about a company.


Upon putting the majority of the available alternatives for 7440 and 7443 bulbs to the test, we concluded that 7443 bulbs are more suitable. These bulbs offer two filaments for increased brightness and clarity and can also fit into existing 7440 sockets. Furthermore, they flicker when the car turns on the signals. When purchasing a new turn signal bulb for a vehicle, 7443 bulbs are a great option.

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