4157 Light Bulb


The 4157 automotive bulb is a dual beam lamp that can be used as a replacement part for various applications, such as turn signals, brake lights, and tail lights. It utilizes the Halogen technology and has two filaments, one for the low beam and one for the high beam. The bulb is usually used in reflector headlights and has a nominal power of 12 volts and 27/8 watts.


The 4157 light bulb family is interchangeable with the following bulbs

The name 4157 is deciphered as follows: the first two digits (41) represent the bulb's diameter in millimeters, while the last two digits (57) represent the bulb's overall length in millimeters. The bulb uses the P27/7W cap (base) and has a typical lifespan of 1-2 years. 

The bulb's specs include a brightness of 402/60 lumens (low/high beam) and a color temperature of 3200K. It is interchangeable with other bulb types, such as 3157 and 3057, but it is important to check the owner's manual or consult with a professional to ensure compatibility.