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Home >> BMW >> 2021 >> X3 xDrive30i >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Engine Electrical System -- Repair (2 Of 2) (G01) >> 12 51 Engine Wiring Harness >> 12 51 245 Remove and install/replace transmission module engine wiring (X3 xDrive 30i, 2018-2022) >> Notes

12 51 245 Remove and install/replace transmission module engine wiring (X3 xDrive 30i, 2018-2022): Notes

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. Do not pry off using a tool.