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So I ordered an alternator from reputable online parts source. My mechanic opened box and pulled up and down in/out on spindle. It made a popping or clicking noise as he pulled/pushed.
He claims it's no good. He has a fast and same price solution. But is this a thing or is he being overly cautious...??

[JB20DGM]

Is it a remanufactured alternator or actual new one? I have a brand new one here (not reman) waiting to go in my 325 and there is absolutely no play on the pulley. No type of clicking noise either.

[mainbearing]

That alternator is no good. Sounds like a bum reman? The only motion of the pulley should be rotational only.

I replaced my Bosch 180 amp's voltage regulator assembly preventatively per VehicularDIY's video. When I need to replace the alternator I would use a new one, most likely a Bosch. This is for electronics compatibility, even though I do not like Bosch. However, TYC 180 amp at $210 on Rock Auto looks like a very good deal. Since my TYC starter is working great (replaced the known slow crank Bosch junk), I might try their alternator.

[lordnikon]

I went with a new 180 amp Valeo unit. No problems for me so far.

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OP here.... Very helpful thanks guys.

I was able to get online seller to agree to a return and a return label

Sadly on my 330i the alternator is wedged against the intake so no way to just replace regulator... very easily. So paying once and having mechanic replacing both