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I have a 2010 320d E90 and it does NOT have an IBS on the negative terminal cable. Wasn’t a problem until very recently my car stopped cranking and the engine failed to start. This happens every now and then and the only solution to get it started is to perform a battery reset - Remove the battery’s negative terminal cable for about 15-20 minutes and plug it back. The engine then starts normally.
Not sure what does this battery reset do to the system that makes the engine start which otherwise won’t.
PS: There’s no iDrive, BMW Assist and Bluetooth in the car.
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