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Home >> BMW >> 2021 >> X3 M40i >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Engine Electrical System -- Repair (2 Of 2) (G01) >> 12 51 Engine Wiring Harness >> 12 51 240 Remove and install/replace Module 2, sensor system engine wiring (X3 M40i, 2018-2019) >> Removing the engine wiring harness for sensor system 2

Removing the engine wiring harness for sensor system 2

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 

Engine wiring harness for sensor system 2 

G14298111Courtesy of BMW OF NORTH AMERICA, INC.
NOTE: RISK OF DAMAGE 
Electrostatic discharge. 
Damage to or destruction of electrical components. 
  • Leave the electrical components in their original packaging until they are being installed. Only use the original packaging for returning the product. Always package removed components straight away.
  • Read and comply with user information on using the associated special tool 12 7 060.
  • Only tap the housings of electrical components. Do not tap pins or multi-pin connectors directly.
  • Wear electrically conductive clothing and antistatic shoes (with ESD symbol).
  • For additional information, see: NOTES ON ESD PROTECTION (ELECTRO STATIC DISCHARGE) .
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.
G14298018Courtesy of BMW OF NORTH AMERICA, INC.
G14298116Courtesy of BMW OF NORTH AMERICA, INC.
G14298119Courtesy of BMW OF NORTH AMERICA, INC.
G14298122Courtesy of BMW OF NORTH AMERICA, INC.