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12-05-2020, 11:37 AM

#11

darnell moore

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My Ride: 550i

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Quote:

Originally Posted by Chris Mac

Try unplugging the little blue connector in your trunk. It should be a wire coming off the negative terminal on the battery.
if it starts after that is unplugged then your IBS is bad.
Its worth a shot.

Unplugged blue plug and she fired right up. What is IBS and can I drive it blue unplugged?

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12-05-2020, 11:37 AM

#12

darnell moore

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Thank you so much.

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12-05-2020, 11:41 AM

#13

donpb

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Great! I had the same exact problem. Glad you tried that before charging. If you leave the IBS unplugged, the alternator will not be able to adjust your charge rate which will affect your gas mileage and also [might] damage your battery in the long run.

Last edited by donpb; 12-05-2020 at 11:44 AM.