3457 vs 3157: Are They Interchangeable?

Here we will discuss the 3457 and 3157 automotive light bulbs that are often used in vehicles. These bulbs are similar in some ways but there are also some key differences that we will explore.

When it comes to automotive light bulbs, there are a few different options to choose from. Two of the most popular options are the 3457 and 3157 bulbs. Both of these bulbs are very popular for a number of different reasons. Moreover, they are pretty interchangeable, so you can replace one with another without any mistakes.

Although they both look quite similar to each other and serve the same purpose of being used as turn signal bulbs, there are some major performance differences between the two bulb types. If you're looking to upgrade your turn signal or tail light bulbs, we can help you make the best decision for your needs.

These bulbs have several differences and some similarities. Here we will review them in the respect of their light output, beam pattern, lifespan, price, etc.

What Is the 3457 Lamp?

These bulbs are usually used in turn signals and they come in a wide range of voltages. The most common ones are the 12-volt and 24-volt options. These bulbs have a bayonet base which makes them easy to install. Moreover, they have dual filaments which means that they can produce both high and low beam light.

Drivers, in general, don`t have problems with these bulbs since they are known for being quite reliable. However, one thing that some people don`t like about them is the light output. These bulbs produce a yellowish light which is not as bright as some other options on the market. So, if you`re looking for a super bright bulb, the 3457 might not be the best option for you.

The pros of this bulb are that it`s affordable and easy to find. You can also get them in different voltages which is great if you have a unique electrical system in your vehicle.

What Is the 3157 Lamp?

When speaking of 3157 bulbs, automobilists usually compare them with the 3457 options. The major difference between these two types is that the 3157 bulbs have a wedge base instead of a bayonet base. This can make them a bit more difficult to install but it`s not a huge issue. The other main difference is the light output.

Their installment is pretty easy, however, they may require a bit more effort than the 3457 types. For instance, the 3157 bulbs should be inserted in a way that the wedge is facing downwards.

However, one downside to this design is that it can make the bulb burn out faster. So, even though they`re brighter, they might not last as long as some other options. These bulbs are a great option if you`re looking for something that`s super bright. But, keep in mind that they might not last as long as some other options on the market.

Socket compatibility

As we have already mentioned, the 3457 and 3157 bulbs are quite interchangeable. However, there is one key difference that you should be aware of.

The 3457 bulb has a bayonet base which means that it will fit in a socket that`s designed for this type of bulb. On the other hand, the 3157 bulb has a wedge base. So, it will only fit in a socket that`s designed for this type of bulb.

This can be an issue if you`re trying to replace a 3457 bulb with a 3157 bulb or vice versa. So, make sure that you check the socket compatibility before making a purchase.

Specs Comparison of 3457 vs 3157 Bulbs

So, after you have read all the general differences between these two types of bulbs, it's time to compare their specs side by side. This will give you a better idea of which bulb is better suited for your needs. Our comparison table will help you to sort it out.

Specs	3457 bulb	3157 Bulb
Base	T25	T25
Number of filaments	2	2
Applications	Daytime running lights, turn signal lights, brake lights, reversing lights, and side marker lights.	Daytime running lights, turn signal lights, brake lights, reversing lights, and side marker lights.
Nominal power	12 V: 29 7V: 27	12 V: 27 7 V: 24
Cross Compatibility	3157, 3157NA, 5702A, 4157NA, 3057, 3454NA, 4157, 3047, 3357A, 3757A, 3457, 4114, 3357, 4114LL, 3457K, 3157LL, 4157K, 3057LL, 4157NAK, 3357LL, 4057LL, 3157K, 3357K	3155, 3457, 4057,4157, 5702, 4157NA, 3057, 4114K, 3157X, 3157AK, 3157NALL, 3047K, 3757ALL, 3157KX, 5702AK

Nominal Power

The main difference between 3457 and 3157 bulbs is their wattage. Coming in at 29 watts, 3457 bulbs draw a bit more power than 3157 bulbs which are rated for 27 watts. This makes a big brightness and visibility distinction for other drivers. Such a nominal power usually features a brighter light output. Moreover, the voltage of these two lamps is 12.8 volts.

Beam Pattern

Another big difference between these two types of bulbs is their beam pattern. The 3457 bulb has a more focused and narrower beam pattern than the 3157 bulb. This means that the light from a 3457 bulb will be more concentrated in one area, while the light from a 3157 bulb will be more diffused.

The beam pattern is an important consideration when choosing an automotive bulb because it will determine how far and how wide the light from your vehicle will be seen by other drivers.

Light Output

3457 bulbs not only require more power but also provide a brighter light output than 3157 bulbs. While 3157 bulbs generate 402 lumens, 3457 bumps that up to 502 lumens. They are more visible to other drivers, easier to make out in bad weather conditions, and also look nicer on your car.

You may think that such a brightness level is not worth the price, but in reality, it is. In fact, such a light output is necessary for a comfortable and safe ride. The lower the brightness level for a bulb, the more likely it is to cause an accident.

Lifespan

One negative effect of 3457 bulbs is that they don't last as long, usually only about 500 hours. On the other hand, 3157 bulbs are much more durable, labeled as 'long service' with a lifespan of 10,000 hours. Those drivers who want to prolong the lifespan of their bulbs, have to consider several aspects.

First, the voltage should not exceed the specified value. Second, the connector should be clean and tight to avoid any flickering. Finally, the amperage must be within the recommended range to prevent overheating.

Price

The price is one of the key considerations when choosing an automotive bulb. 3457 bulbs are more expensive than 3157 bulbs, but they offer a brighter light output and a more focused beam pattern.

So, if you are looking for a bulb that will provide you with better visibility and safety, then a 3457 bulb is a good option. However, if you are looking for a bulb that will last longer and save you money in the long run, then a 3157 bulb is the better choice.

Color Temperature

The 3457 lamp has a 2800K color temperature, while the 3157 is about 3000K. As you can see, the difference is pretty small, so it is not a big factor to consider when choosing between these two types of bulbs. If you want warm light with a yellowish tint, then the 3457 bulb is a good option. If you prefer a slightly cooler light with a whiter tint, then the 3157 bulb is the better choice.

FAQs

What bulb can I use instead of 3157?

The 3057 and 3157 bulbs are compatible with each other and can act as replacements for one another. The defining factor is that they have the same plastic wedge base; hence, their interchangeable use. However, do not replace the 3157 with the 3057 in daytime running light (DRL) applications.

Will a 3157 bulb work a 3156 socket?

Yes! The 3157 LED bulb is the dual filament option for the 3156 LED bulb. This means that you can easily use a 3157 bulb with a 3156 socket.

What is a 3457 bulb used for?

These bulbs will enhance your car or truck's interior and exterior auxiliary lighting without fail. You can use them for your car's backup/reverse lights, trunk lights, dome lights, and more. They are also a direct replacement for the existing bulbs in your vehicle.