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Home >> BMW >> 2021 >> M3 Base, Automatic Trans >> Repair and Diagnosis (Single Page) >> Electrical >> Charging Systems >> Engine Electrical System -- Repair M3 (G80) >> 12 51 Engine Wiring Harness >> 12 51 235 Remove and install/replace Module 1, sensor system engine wiring (M3 base, M3 Competition) >> Installing the engine wiring harness for sensor system 1

Installing the engine wiring harness for sensor system 1

Engine wiring harness for sensor system 1 

G14902307Courtesy of BMW OF NORTH AMERICA, INC.
NOTE: RISK OF DAMAGE 
Improper routing of cables and wiring harnesses 
Trapped, crushed or damaged cables may cause short circuits and malfunctions 
  • Route all cables without abrasions, do not trap and crush
G14927447Courtesy of BMW OF NORTH AMERICA, INC.
TIGHTENING TORQUE SPECIFICATIONS

Cable bracket on rear cylinder head/transmission 
M6 x 20 tightening torque  8 Nm
G14230526Courtesy of BMW OF NORTH AMERICA, INC.
TIGHTENING TORQUE SPECIFICATIONS

Cable bracket on rear cylinder head/transmission 
M6 x 20 tightening torque  8 Nm
G14206968Courtesy of BMW OF NORTH AMERICA, INC.

The connectors (1) must engage audibly

G14927442Courtesy of BMW OF NORTH AMERICA, INC.
TIGHTENING TORQUE SPECIFICATIONS

Electric coolant pump to holder 
M6 tightening torque  8 Nm
G14901744Courtesy of BMW OF NORTH AMERICA, INC.

Follow-up work