61 20 900 Disconnecting and connecting battery negative lead

WARNING: Follow safety regulations   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 negative lead (2) and secure at side.

Fig 2: Identifying Battery Negative Lead And Nut

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Version with intelligent battery sensor (IBS):

Loosen nut (1).

Tightening torque 61 21 1AZ .

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

Fig 3: Identifying Battery Negative Lead And Nut

Courtesy of BMW OF NORTH AMERICA, INC.