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Home >> BMW >> 2017 >> 530i >> Repair and Diagnosis (Single Page) >> Electrical >> Charging Systems >> Engine Electrical System - Repair (G30) (3 Of 5) >> 12 51 Engine Wiring Harness >> 12 51 210 Replacing the wiring harness section for injectors and ignition coils (530i 2017-2022, 530i xDrive 2017-2022) >> Remove the wiring harness section for the ignition and injectors

Remove the wiring harness section for the ignition and injectors

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.
NOTE: RISK OF DAMAGE 
Damage to battery terminal, the safety battery terminal or the intelligent battery sensor (IBS). 
Damaged battery terminals can lead to malfunctions or vehicle electrical system faults. 
  • Detach battery terminal from battery pole by carefully shifting to and fro. Do not pry off using a tool.

Preliminary work 

NOTE: RISK OF DAMAGE 
Damage to wires when disconnecting connectors and plug connections. 
Sheared wires can cause a short circuit. 
  • Do not pull on wires when disconnecting connectors and plug connections.