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Home >> BMW >> 2013 >> ActiveHybrid 7 >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Engine Electrical System - Repair -- ACTIVEHYBRID 7 >> Alternator With Drive And Mounting >> 12 31 022 Removing and installing or replacing starter motor generator (N55 Hybrid)

12 31 022 Removing and installing or replacing starter motor generator (N55 Hybrid)

WARNING: High-voltage system - danger to life! 
The following points must be strictly observed prior to starting work: 

Necessary preliminary work: 

Unlock connector (1) and remove.

Remove protective cap (2) and release nut underneath.

Tightening torque 12 42 1AZ .

Remove battery positive lead.

Release screws (3).

Tightening torque 12 31 1AZ .

Fig 1: Identifying Starter Motor Generator Connector, Protective Cap And Screws (N55 Hybrid)
G11176817Courtesy of BMW OF NORTH AMERICA, INC.

Release screws (1) a few turns until holder (2) for air conditioning compressor is loose. Do not  remove bracket (2).

Tightening torque 12 31 3AZ .

Feed out and remove starter motor generator.

Fig 2: Identifying Air Conditioning Compressor Holder And Screws
G11176818Courtesy of BMW OF NORTH AMERICA, INC.

Assemble engine.