2009 E89 Intermittent Start

glimmer · 03-24-2021, 03:56 PM

Just ran around a little today and got in the car, pushed in the key, everything lit up, pushed the start button and nothing. I pulled the key back out, put it back in, nothing. I turned the key around and repeated and it started right up. Made a few more stops and it started fine. I made one more stop and it did it again. Pulled the key out a few times like at first and nothing, turned it around and it fired right up. Does anyone have any ideas about what could be causing this? Could the key be losing its charge. My car is a E89 35i from 2009 with about 54000 miles. thanks to all in advance! I should mention the battery is one month old. Just switched keys and it started 4 times so far no problem.

paris1 · 03-24-2021, 06:12 PM

How old is the battery?

glimmer · 03-24-2021, 07:56 PM

1 month

paris1 · 03-24-2021, 11:31 PM

Was the battery properly registered with the ECU? (Just thinking off the top of my head here).

glimmer · 03-26-2021, 08:50 AM

Yes I have started using my other key. but have only started it about 5 times. Its been starting. I'll see how that goes.

glimmer · 03-26-2021, 06:12 PM

It did it several times today. Got my fox well out and I get A0B4 and A0C1. Could it be the BST?

03-24-2021, 03:56 PM	#1
glimmer Enlisted Member 24 Rep 43 Posts Drives: 2020 Z4 M40i, 2022 X3 M40i Join Date: Aug 2018 Location: Webster Groves MO iTrader: (0)	2009 E89 Intermittent Start Just ran around a little today and got in the car, pushed in the key, everything lit up, pushed the start button and nothing. I pulled the key back out, put it back in, nothing. I turned the key around and repeated and it started right up. Made a few more stops and it started fine. I made one more stop and it did it again. Pulled the key out a few times like at first and nothing, turned it around and it fired right up. Does anyone have any ideas about what could be causing this? Could the key be losing its charge. My car is a E89 35i from 2009 with about 54000 miles. thanks to all in advance! I should mention the battery is one month old. Just switched keys and it started 4 times so far no problem. Last edited by glimmer; 03-24-2021 at 07:57 PM..
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03-24-2021, 06:12 PM	#2
paris1 Captain 90 Rep 745 Posts Drives: 2013 35i Space Grey over Coral Join Date: Oct 2014 Location: Northern Calif. iTrader: (0)	How old is the battery?
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03-24-2021, 07:56 PM	#3
glimmer Enlisted Member 24 Rep 43 Posts Drives: 2020 Z4 M40i, 2022 X3 M40i Join Date: Aug 2018 Location: Webster Groves MO iTrader: (0)	1 month
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03-24-2021, 11:31 PM	#4
paris1 Captain 90 Rep 745 Posts Drives: 2013 35i Space Grey over Coral Join Date: Oct 2014 Location: Northern Calif. iTrader: (0)	Was the battery properly registered with the ECU? (Just thinking off the top of my head here).
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03-26-2021, 08:50 AM	#5
glimmer Enlisted Member 24 Rep 43 Posts Drives: 2020 Z4 M40i, 2022 X3 M40i Join Date: Aug 2018 Location: Webster Groves MO iTrader: (0)	Yes I have started using my other key. but have only started it about 5 times. Its been starting. I'll see how that goes.
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03-26-2021, 06:12 PM	#6
glimmer Enlisted Member 24 Rep 43 Posts Drives: 2020 Z4 M40i, 2022 X3 M40i Join Date: Aug 2018 Location: Webster Groves MO iTrader: (0)	It did it several times today. Got my fox well out and I get A0B4 and A0C1. Could it be the BST?
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