Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSBMW2013128I 2D CONVERTIBLE, ENG CD N52, STANDARD TRANSREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 875 (GENERAL ELECTRICAL SYSTEM - REPAIR)20 BATTERY61 12... GENERAL INFORMATION ON INTELLIGENT BATTERY SENSOR (IBS)
2013 BMW 128i 2D Convertible, Eng CD N52, Standard Trans
61 12... General Information On Intelligent Battery Sensor (IBS)
2013 BMW 128i 2D Convertible, Eng CD N52, Standard TransSECTION 61 12... General Information On Intelligent Battery Sensor (IBS)
WARNING: This page is about a different car, the 2010 BMW X5, 2009 BMW X5, 2008 BMW X5, and 2007 BMW X5. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
Do not connect continuous trickle charger to the cigarette lighter.
The cigarette lighter is powered by the rear distribution box via a relay. This relay drops out after terminal 15 OFF. This means that a continuous trickle charger connected to the cigarette lighter is disconnected from the battery.
Charge the battery via the jump-start connection points. Only then can the power supply be registered by the vehicle.
The cigarette lighter is powered by the rear distribution box via a relay. This relay drops out after terminal 15 OFF. This means that a continuous trickle charger connected to the cigarette lighter is disconnected from the battery.
Charge the battery via the jump-start connection points. Only then can the power supply be registered by the vehicle.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.