3157/4157 interchangeable?

[earlyre]

the Right Turn Signal on Mom's 2009 Taurus went out. Went to the Store, looked in the Sylvania Catalog, it says it takes a 4157.

go to replace them, the bulbs in the car, which look to be the factory originals(the nuts holding the housings in still had the factory sealer spooge around them) were Sylvania 3157's.

they seem to work as expected... so, BITOG Lighting Gurus... what's the difference between them?

 

[Padawan]

Lifted this from a different forum. The info was provided by a Sylvania rep.

Lamp Filament Voltage Wattage Lumens

3157 Minor____14v______8.26W_____37
3157 Major____12.8v___26.88W____402

3457 Minor____14v______8.26W_____37
3457 Major____12.8v___28.54W____502

4157 Minor____14v______8.26W_____37
4157 Major____12.8v___28.54W____402

 

[earlyre]

sooo 1.6W more consumption on the Major Filament.
which would be the...stop/turn filament?(burns brighter), or the tail light filament?

should i worry about shorter life, Hotter Burning, plug melting? etc?

 

[bubbatime]

This was posted on another forum when I googled 3157 vs 4157:

"The 3157 and 4157 are different only in their longevity. The 4000 series is a new bulb containing Krypton gases and apparently have up to 4 times the longevity of the 3000 equivalents."

Sylvania sells a 3157/4157 bulb, so at least they think they are basically the same.
https://www.amazon.com/SYLVANIA-3157NA-N...ET0JP1980NDV3C0

 

[tgrudzin]

I wouldn't worry. Probably within allowable tolerance

 

[Mr Nice]

No need to worry.

 

[Linctex]

Originally Posted By: earlyre
sooo 1.6W more consumption on the Major Filament.
which would be the...stop/turn filament?(burns brighter), or the tail light filament?


Minor (low watts) is tail lights.

Major (High wattage) is brake/turn