Re: Turn signal bulbs- 3157 vs. 3457 vs. 4147
I emailed Sylvania and got a response pretty quickly. The differences are minor , but they do not recommend using one for the other.
Good Morning Jeff,
Thank you for your inquiry. Though parts 3157, 3457, and 4157 look similar, they are made to different operating specifications and are not considered interchangeable. We recommend that you replace with the same part number that was used as original equipment. With that said, here are the operating specifications for each of the three part numbers listed:
Lamp Filament Voltage Wattage Lumens
3157 Minor 14 8.26 37
3157 Major 12.8 26.88 402
3457 Minor 14 8.26 37
3457 Major 12.8 28.54 502
4157 Minor 14 8.26 37
4157 Major 12.8 28.54 402
Consumer Care Specialist
OSRAM SYLVANIA, Inc.
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