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BMW 5-Series E60 Sedan was first seen in the Unites States in the fall of 2003 with a 2004 Model Year designation. The E61 wagon followed shortly there after. The E60/E61 5 series is now available as a 528i, 528xi, 535i, 535xi, 550i and a 535xi sports wagon! -- View the E60 Wiki

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Old 05-18-2019, 06:08 PM
scottalexander scottalexander is offline
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Valeo voltage regulator

We have a 2010 528i with N52k.

I called FCP and they sent me the 180 amp voltage regulator for the Valeo alternator (or what they thought was the correct voltage regulator).

I pulled out the alternator.

I started taking disassembling it and figured out the FCP regulator was the wrong one.

After talking with FCP and competitors, they say they don't have the Valeo voltage regulator, nor can they get it. They told me to buy a new alternator for $400.

There must be a army of BMW owners that have changed the voltage regulator in their Valeo alternator.

Where does everyone buy their Valeo voltage regulators?
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Old 05-19-2019, 06:09 AM
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banglenot banglenot is offline
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Google alternator supply houses -- the ones that provide alternators on the general market.

You'll have to get the Valeo part number for the regulator, or the alternator, not the BMW number.

Also, if it's the brushes that are worn, you can replace those with a soldering iron.

Unless the electronics are fried, or the BSD bus is damaged, it's usually just a brush replacement that's needed.

NLA's (No Longer Available) are going to become an increasing problem as the cars age, but brushes will be always available.
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Last edited by banglenot; 05-19-2019 at 06:10 AM.
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Old 05-19-2019, 06:25 AM
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Doug Huffman Doug Huffman is offline
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Quote:
Originally Posted by scottalexander View Post
We have a 2010 528i with N52k. I called FCP and they sent me the 180 amp voltage regulator for the Valeo alternator (or what they thought was the correct voltage regulator). I pulled out the alternator. I started taking disassembling it and figured out the FCP regulator was the wrong one. After talking with FCP and competitors, they say they don't have the Valeo voltage regulator, nor can they get it. They told me to buy a new alternator for $400. There must be a army of BMW owners that have changed the voltage regulator in their Valeo alternator. Where does everyone buy their Valeo voltage regulators?
It is unlikely that Mr. Scott Alexander has the tools or skills to properly identify a failed BSD alternator. To focus on obsolete technology of "voltage regulator" part of alternator is error. The ECU controls alternator output.

https://www.newtis.info/tisv2/a/en/e...-parts/Or82vy4

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Last edited by Doug Huffman; 05-19-2019 at 06:27 AM.
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Old 05-19-2019, 07:41 AM
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banglenot banglenot is offline
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Quote:
Originally Posted by Doug Huffman View Post
It is unlikely that Mr. Scott Alexander has the tools or skills to properly identify a failed BSD alternator. To focus on obsolete technology of "voltage regulator" part of alternator is error. The ECU controls alternator output.

https://www.newtis.info/tisv2/a/en/e...-parts/Or82vy4

Do not ever believe or take advise from a sales clerk that only wants to sell parts!
Doug, Not clear who your comment is directed at, but the regulator is the interface to the ECU, and whatever the ECU wants, the regulator communicates to the alternator electronics.

Please reference https://www.picoauto.com/library/cas...nication-error for an excellent study of the Alternator-regulator- BSD - IBS interfaces, and the specific comment:

Quote:
Knowing the BSD line is directly responsible for alternator output (subject to command from the PCM) the BSD waveform was decoded using the PicoScope decoding feature in an attempt to identify errors within the coded message carried to and from the alternator during the abrupt shutdown (captured above).
So, saying the ECU is responsible for alternator output is like saying it's responsible for firing the plugs. It is, but there is a clear need for the coils to accomplish the actual event.

Also,it's likely that the primary failure points on 100K Valeo alternators are the brushes-slip rings or BSD interface. Both are contained in the regulator interface. Brushes wear out, usually long before the bearings or diodes. If regulators are not available, brushes are universally available and easily swapped with a soldering iron. Slip rings that can't be polished obviously mean a new alternator.

Best, Bangle
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Last edited by banglenot; 05-19-2019 at 07:54 AM.
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