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Home >> BMW >> 2019 >> X3 M40i >> Repair and Diagnosis >> Hybrid/Electric Powertrain >> Electric Motor Systems >> Engine Electrical System -- Repair (1 Of 2) (G01) >> 12 31 Alternator With Drive And Attachment >> 12 31 020 Removing and installing/replacing alternator (X3 4-cyl. models except PHEV, 2018-2019) >> Install alternator

Install alternator

WARNING: Working on 12 V electrical system. 
Risk of short circuits! Risk of fire! 
  • Make sure that there is no charger  connected to the jump start terminal in the engine compartment.
  • Detach battery ground lead from battery.
  • For auxiliary batteries: Detach battery minus cables from all auxiliary batteries.
WARNING: Hot surfaces. 
Risk of burning! 
  • Perform all work only on components that have cooled down.
G14308806Courtesy of BMW OF NORTH AMERICA, INC.
G12701500Courtesy of BMW OF NORTH AMERICA, INC.
G12701493Courtesy of BMW OF NORTH AMERICA, INC.
TIGHTENING TORQUES SPECIFICATION

Alternator on component carrier
M10x75 tightening torque  38 Nm
M10x125 tightening torque  38 Nm
M10x90 tightening torque  38 Nm
TIGHTENING TORQUES SPECIFICATION

Positive battery cable to the alternator
M8 Tightening torque  19 Nm
G12701492Courtesy of BMW OF NORTH AMERICA, INC.
TIGHTENING TORQUES SPECIFICATION

Holder on intake plenum
TS5x25 Tightening torque  5 Nm
G14308802Courtesy of BMW OF NORTH AMERICA, INC.
G14226272Courtesy of BMW OF NORTH AMERICA, INC.

Follow-up work