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      01-08-2018, 02:16 PM   #20
juld0zer
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Australia
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Drives: Prev 135i 7DCT, Now 130i 6sp
Join Date: Jul 2016
Location: 2153

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Check the cable that comes out of the jump start terminal. The one which goes over the engine.

It's more common on 6cyl models but the cable frays inside the fitting so it just dry rots and pulls out or breaks.
Usually if it is that bad it wont start and it wont charge very well but it should bring up 'increased battery discharge' messages.
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