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Old 06-16-2022, 03:36 PM
Join Date: Jul 2019
Location: Czech republic
Posts: 12
James1991 is on a distinguished road
Alternator e53 3.0d - types

Hi. I'm sorry for my bad english. I have an e53 3.0d 135kw year 2002. I bought a refurbished alternator. I have on the car: a three-pin alternator and a two-pin connector leads to it. I received a two-pin alternator from the supplier, can I connect a two-pin connector to it? thank you very much
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Old 06-16-2022, 03:58 PM
Join Date: Mar 2016
Location: Saskatchewan Canada
Posts: 1,434
80stech is on a distinguished road
The third pin is usually for remote voltage sensing so if the alternator only has 2 pins then the voltage sensing is done internally on the battery terminal. The 2 pin connector on the 2 pin alternator should be fine and a 3 pin connector with a 2 pin alternator should be fine but the 3 pin alternator with only 2 pins connected would be more likely to be a problem.
1988 325is (purchased new) sold
2004 X5 3.0 2005 X3 2.5
2008 X5 3.0 (new to me)
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Old 06-17-2022, 04:57 AM
Join Date: Jul 2019
Location: Czech republic
Posts: 12
James1991 is on a distinguished road
Thank you so much. The car was originally: a two-pin connector + a three-pin alternator.
I will now install: a two-pin alternator (on the original two-pin connector).
But I understood from your text that it should be fine. Well, I'll do it today anyway and see if it works out. Thank you
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