I read the document and see it is rated to 180c which is more than 4x the temperature here right now (41c) but the water temp is at least 70c all the time while air temp under the hood is rarely over 60c.

Why add heat. I have never heard a functional alternator so I really don't get all the harping on low dba.

Bottom line new rebuilt Bosch unit is out for delivery & will go in tomorrow. I just don't get outside places that are cold how this got off the ground.

Additionally, if it's so good why did BMW go away from it?

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BMWCCA # 480346

'72 e6Tii rip
'90 e30iC sold