61 20 900 Disconnecting and connecting battery earth lead

WARNING: Observe safety information for HANDLING VEHICLE BATTERY .
Follow instructions for DISCONNECTING AND CONNECTING BATTERY .
Follow instructions on INTELLIGENT BATTERY SENSOR (IBS) .

Open cover (1).

Fig 1: Identifying Cover

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Version without intelligent battery sensor (IBS):

Loosen nut (1).

Tightening torque 61 21 1AZ .

Disconnect battery earth lead (2) and secure at side.

Fig 2: Identifying Battery Earth Lead And Nut

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Version with intelligent battery sensor (IBS):

Loosen nut (1).

Tightening torque 61 21 1AZ .

Disconnect battery earth lead (2) and secure at side.

Fig 3: Identifying Battery Earth Lead And Nut

Courtesy of BMW OF NORTH AMERICA, INC.