I’m probably going to need to replace my alternator (bat light on in dash) but iv noticed in may post that the voltage regulator was the culprit in may situations.

Iv looked up the part from real OEM but was wondering this:

If I replace the alternator part number 12317508054 dose that include the voltage regulator part number 12-31-1-713-491-M14?

Are these two totally separate things or is the voltage regulator part of the alternator?

Thanks