Use only top quality BMW reman Alternators like Bosch or Denso. Cheap aftermarket BMW 325 alternators will cost you more in the long run.
If your BMW 325 starter has failed, we reccomend replacing the starter with a high quality starter. DriveWire sells OE quality BMW 325 starters at low prices.
The internal type of a BMW 325 alternator regulator is located within the alternator and in some cases is replaceable. To replace the BMW 325 regulator you must remove the power form the battery. The preferred way is to just remove the ground or negative battery cable prior to servicing the BMW 325 alternator or regulator. If the regulator is internal and is not removable, then the entire BMW 325 alternator assembly will need to be replaced.