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Old 07-26-2010, 11:17 PM
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bluebee bluebee is offline
Seek to understand,^Value
Location: San Jose, California
Join Date: Mar 2008
Posts: 25,236
Mein Auto: 02 BMW 525i M54 auto 130K
Originally Posted by doru View Post
when running, my alt shows about 13.7V ... Not sure about the alternator brand
Mine showed less than 12 volts at idle. I forgot to rev it up so I'll try that next and see if it changes the number at all ... but it's looking like the alternator is kaput (maybe that's the noise I heard over in this thread).

As for the brand of alternator, I was confused by REALOEM because it showed three for my serial number:
- 90 amp Valeo alternator
- 120 amp Bosch generator <=== why do they call this a "generator" and not an "alternator"?
- 120/140 amp Valeo alternator

So I took a mechanic's mirror and snapped a shot to get your advice. (This shot below is flipped horizontally so that we can read the mirrored lettering.)

I can make out "BOSCH120", and the number "0 124 515 050" and "NCB1 14V 70-120A" and "7 501 595 GL" and "Made in Great Britain 806".

I hope it's the same one cn90 rebuilt ... 'cuz then the parts would be the same ... but I doubt it (given the different year).

Is the right approach either to rebuild (as per cn90) or to replace with a 1:1 Bosch 120 amp remanufactured unit? Or new?

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Last edited by bluebee; 07-27-2010 at 01:50 AM.
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