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Home >> BMW >> 2018 >> 320i xDrive >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Engine Electrical System - Repair - F30 >> Alternator With Drive And Mounting >> 12 31 020 Removing and installing or replacing alternator (N20, N26)

12 31 020 Removing and installing or replacing alternator (N20, N26)

Necessary preliminary tasks: 

Release screws (1).

Tightening torque: 12 31 1AZ .

Fig 1: Identifying Screws
G09914176Courtesy of BMW OF NORTH AMERICA, INC.

Unlock connector (1) and remove.

Release nut (2) and remove the positive battery cable.

Tightening torque: 12 42 1AZ .

Disconnect tank ventilation line (3) and place to one side.

Feed out alternator (4) to the left and remove.

Fig 2: Identifying Connector, Nut, Ventilation Line And Alternator
G09914177Courtesy of BMW OF NORTH AMERICA, INC.

Assemble engine.