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  #11  
Old 10-15-2026, 10:35 PM
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Yeah it's pretty oily from what little I can see. I replaced the PS reservoir about two years ago and it did drip some on the alternator.

So the voltage regulator isn't likely to be the issue? A reman alternator is about $250. I see them in 90, 120, and 140 amp versions so I’m not sure which one to get.
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  #12  
Old 10-15-2026, 10:42 PM
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Quote:
Originally Posted by Salty B. View Post
Yeah it's pretty oily from what little I can see. I replaced the PS reservoir about two years ago and it did drip some on the alternator.

So the voltage regulator isn't likely to be the issue? A reman alternator is about $250. I see them in 90, 120, and 140 amp versions so I’m not sure which one to get.
If you have heated seats I think 140 is what you want. If you put your vin into RealOEM it should tell you what it would have come with.
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  #13  
Old 10-16-2026, 09:49 AM
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Quote:
Originally Posted by Fifty150hs View Post
If you have heated seats I think 140 is what you want. If you put your vin into RealOEM it should tell you what it would have come with.
Ahhhh OK, yes I have heated seats. Noted.

I think I will replace the voltage regulator first. Not that expensive...

Appreciate the tips!
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2002 E46 M54 2.5 5MT silver over black sensatec 217,000mi
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  #14  
Old 10-16-2026, 10:25 AM
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Quote:
Originally Posted by Salty B. View Post
Ahhhh OK, yes I have heated seats. Noted.

I think I will replace the voltage regulator first. Not that expensive...

Appreciate the tips!
When an alternator fails it isn't typically the VR. It's usually the brushes or slip rings have worn out and not making contact. When that starts to happen is when you get the intermittent light. IIRC you can buy rebuild kits for our alternators that replace the brushes and slip rings. Just be sure you get the ones for the brand alternator you have. Its typically either Bosch or Valeo.
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  #15  
Old 10-17-2026, 12:38 AM
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Quote:
Originally Posted by Fifty150hs View Post
When an alternator fails it isn't typically the VR. It's usually the brushes or slip rings have worn out and not making contact. When that starts to happen is when you get the intermittent light. IIRC you can buy rebuild kits for our alternators that replace the brushes and slip rings. Just be sure you get the ones for the brand alternator you have. Its typically either Bosch or Valeo.
Got one on order, along with new VR. Thx.
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