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///M3 Forum
The BMW E46 ///M3 is the M version E46 and puts out an amazing 333 HP and 262 lb-ft of torque at stock specs! There are an amazing amount of modifications for both the coupe and convertible models so read up and get started modifying your cars today!

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Old 06-05-2017, 07:09 PM   #1
Ivanfbaby88
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Bosch and valeo alternator

So my alternator went out and I noticed that the bottom half with the bearing and everything else was Bosch but the upper where my voltage regulator which was what I found was the issue so me being me thinking valeo and Bosch made a collab or something order a Bosch voltage regulator since it was cheaper basically my question is will the Bosch one work or is the valeo one needed
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Old 06-06-2017, 07:26 PM   #2
PITT M3 RR
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You need the Valeo one for a Valeo alt.

Bosch for bosch.
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Last edited by PITT M3 RR; 06-06-2017 at 07:27 PM.
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Old 06-07-2017, 08:38 AM   #3
Solidjake
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+1 they are not interchangeable as the connectors and voltage regulators are different.
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Old 06-09-2017, 01:33 PM   #4
Ivanfbaby88
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Well I did some digging and aparantly Bosch has been refurbishing old valeo alternators and just keep the valeo regulators which is what I have I order the part and did the job myself for 70$ compared to BMW charging 500+ time to crack a cold one with the boys
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Old 06-10-2017, 12:55 AM   #5
Commando
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Congrats on sorting that issue.
Does Bosch really have an interest in refurbing old alternators at all?
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