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Home >> BMW >> 2021 >> M440i xDrive >> Repair and Diagnosis >> Electrical >> Gauges >> Engine Electrical System -- Repair (G22, G23 & G26) (2 Of 2) >> 12 51 Engine Wiring Harness >> 12 51 235 Remove and install/replace Module 1, sensor system engine wiring (430i and 430i xDrive coupe/convertible/Gran Coupe sedan) >> Installing the engine wiring harness for the sensor system 1

Installing the engine wiring harness for the sensor system 1

Engine wiring harness for sensor system 1 

G15545146Courtesy 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.
TIGHTENING TORQUE SPECIFICATION

Wiring harness section for engine to cylinder head cover
M6 Tightening torque  8 Nm
G14206975Courtesy of BMW OF NORTH AMERICA, INC.
G14192393Courtesy of BMW OF NORTH AMERICA, INC.
CAUTION: Improper routing of the positive battery cable. 
Risk of short circuits! 
  • Route the positive battery cable without abrasions and do not trap.
G14192404Courtesy of BMW OF NORTH AMERICA, INC.
TIGHTENING TORQUE SPECIFICATION

Battery positive lead to starter
M8 Tightening torque  13.5 Nm
TIGHTENING TORQUE SPECIFICATION

Cable bracket on rear cylinder head/transmission
M6 x 20 tightening torque  8 Nm
G14206985Courtesy of BMW OF NORTH AMERICA, INC.
TIGHTENING TORQUE SPECIFICATION

Cable bracket on rear cylinder head/transmission
M6 x 20 tightening torque  8 Nm
G14206968Courtesy of BMW OF NORTH AMERICA, INC.
G14206966Courtesy of BMW OF NORTH AMERICA, INC.

Follow-up work