Thank you for your question about Are 3157 and 3457 bulbs interchangeable.

In this time, I would like to answer you if 3157 and 3457 interchangeable.

3157 and 3457 bulbs are same base type, which is “w2.5*16q”.

Only difference bewteen 3157 and 3457 bulbs interchangeable is power.

3157 is 27w, but 3457 bulbs are 29w.

If you don’t mind of watts, those 3157 and 3457 bulbs can be interchangeable.

At recent years, you can see all of 3157 and 3457 led bulbs are interchangeable in the world markets.