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Home >> BMW >> 2009 >> M3 2D Convertible, Standard >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 65 (General Electrical System - Repair - E90) >> Battery >> 61 20 900 Disconnecting and connecting battery negative lead

61 20 900 Disconnecting and connecting battery negative lead

WARNING: This page is about a different variant/trim than selected.
WARNING: Observe SAFETY INSTRUCTIONS  for handling vehicle battery.
Follow INSTRUCTIONS for disconnecting and connecting battery
IMPORTANT: Do not under any circumstances use force to pull/lever off INTELLIGENT BATTERY SENSOR (IBS)  .

Necessary preliminary tasks 

Loosen nut (1).

Tightening torque 61 21 1AZ .

Disconnect battery negative lead (3) and secure at side.

Fig 1: Identifying Battery Negative Lead And Nut
G04727571Courtesy of BMW OF NORTH AMERICA, INC.