Voltage regulator or alternator replacement? 2005 v6

[OG BobG]

Having what I have diagnosed as a faulty voltage regulator. Voltage at OBDII varies wildly with RPM, dropping below 12v sometimes at idle but able to get above 14v running above idle.

Question is:
Should I just replace entire alternator or pull alternator and only swap out voltage regulator?
It is a 21 year old car, probably original alternator and 170k miles.
Should I just replace entire alternator, since from what I have found I need to pull alternator to replace voltage regulator anyway? Obviously alternator is more expensive than regulator, but not a lot ($200ish for top brands).
It is an extra car, but have no plans to get rid of it, love my convertible!

TIA for advise! Trolls will be ignored

Bob

 

[asdrew]

At 170k, you may as well do the whole alternator and be done. #ymmv

 

[pass1over]

had my oem alternator rebuilt locally, no chinese rebuilt junk

 

[08TorchRedShelbyGT500]

At 170k, you may as well do the whole alternator and be done. #ymmv

+1

 

[86GT351]

Deffinitely replace the whole alternator. Also check the Smart Junction Box for any signs of water intrusion.

 

[DieHarder]

If you don't want to wait get a Denso (09 or 10). If you can wait have an alternator shop rebuild it. Probably about the same cost wise.