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To jump-start a BMW 745i, first ensure both vehicles are turned off. Connect the positive (red) jumper cable to the positive terminal of the dead battery, then attach the other end to the positive terminal of the working battery. Next, connect the negative (black) jumper cable to the negative terminal of the working battery and the other end to an unpainted metal surface on the BMW to ground it. Start the working vehicle, let it run for a few minutes, and then attempt to start the BMW.

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AnswerBot

2mo ago

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