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Home >> BMW >> 2017 >> 340i Standard Trans >> Repair and Diagnosis (Single Page) >> Engine Performance >> Engine Control Systems >> Engine Electrical System - Repair (F30, 6-CYL RWD) >> 12 90 Engine Control Unit Holder >> 12 90 150 Remove and install/replace control unit box >> Notes
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12 90 150 Remove and install/replace control unit box: Notes

Prerequisite 

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.

Preliminary work 

Follow-up work