BMW E46 Alternator Replacement

[daywalker780]

Hi, I am having a problem with my BMW E46. I've replaced the faulty alternator. Since 120 amp alternator is no longer on the market, I replaced it with 150 amp Bosch alternator. It runs fine. However, there is a problem. The DME control unit seems to not able to detect my new alternator and the battery warning light on my instrument cluster is on. It says 'unknown alternator' and I am required to reprogram the DME. I heard that it is possible to replace the 120 amp alternator with 150 amp alternator but we need to reprogram the DME. I tried to click on the Coding/Program button on my DIS ver 43, then I chose Option 5: Programming - > DME Programming. In DME Programming, there are 5 options. Option 1: Determine the basic control unit, Option 2: Exchange Control Unit, Option 5: Clear Control Unit Adaptation. Could somebody give me a helping hand or at least point me into the right direction? Thanks

[laldog]

Where did you source the new one from. Some reconned units are unable to be seen by the ECU.

[daywalker780]

Where did you source the new one from. Some reconned units are unable to be seen by the ECU.
They are brand new Bosch Alternator.

[daywalker780]

How could I tell the DME about the new alternator? From the fault code and test plan, it says that I need to reprogram DME. However, I am stucked in DME programming. Please hrlp.

[daywalker780]

The problem is now solved by someone in coding. However, he refused to teach me on that.