General notes

The battery may only be recharged with a battery charger that has been approved by BMW and that has a constant charging voltage of 14.8V.

If possible, the battery temperature should be between 15 °C and 25 °C during charging. Under these preconditions, the battery is adequately charged when the charge current drops below 2.5 amps.

If the battery is recharged at low temperatures, the charging procedure should not be ended until the charge current drops below 1.5 A.

On vehicles with IBS, recharging the battery directly at the battery terminals could lead to a misinterpretation of the battery condition and even unwanted Check Control messages or fault entries.

If the battery is recharged while it is installed, it must be recharged using the jump start terminal points, whenever jump start terminal points are provided in the engine compartment. Only then can you be sure that charging is correctly recognized by the vehicle electronics on vehicles with an intelligent battery sensor (IBS).

Except for MINI from R55 model:  These vehicles do not have any jump start terminal points in the engine compartment. On these vehicles, the positive terminal of the battery charger must be directly connected to the battery. On vehicles with a gasoline engine, the negative terminal can be connected to the lifting eye (suspension lug) on the transmission and on vehicles with diesel engines to a flange on the engine bearing block on the engine.

In the case of stored or stationary vehicles the battery must be recharged at regular intervals in order to avoid a total discharge and thus damage.

After replacement of the battery and registration of the battery replacement, or after replacement of the intelligent battery sensor (IBS), the vehicle must be in rest state for at least 3 hours: Only then can the new state of charge be determined by open-circuit voltage measurement.