61 20 900 Disconnecting and connecting battery earth lead

WARNING:

Observe SAFETY INSTRUCTIONS for handling vehicle battery.

IMPORTANT: Do not use force to pull or lever off battery terminal with IBS.

Necessary preliminary tasks:

Main battery:

Loosen nut (1).

Tightening torque 61 21 1AZ .

Remove battery earth lead with IBS (2).

Lay battery earth lead with IBS (2) aside and secure.

Installation note:

Make sure the battery earth lead (2) is correctly seated at the negative battery terminal.

Fig 1: Identifying Battery Earth Lead With IBS And Nut

Courtesy of BMW OF NORTH AMERICA, INC.

Auxiliary battery:

Loosen nut (1).

Tightening torque 61 21 1AZ .

Pull battery earth lead (2) off upwards.

Lay battery earth lead (2) aside and secure.

Installation note:

Make sure the battery earth lead (2) is correctly seated at the negative battery terminal.

Fig 2: Identifying Battery Earth Lead And Nut (Auxiliary Battery)

Courtesy of BMW OF NORTH AMERICA, INC.