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Home >> BMW >> 2021 >> X4 xDrive30i >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Engine Electrical System -- Repair (G02) >> 12 51 Engine Wiring Harness >> 12 51 235 Remove and install/replace Module 1, sensor system engine wiring (X4 M40i 2022-2023) >> 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 

G15980601Courtesy 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 SPECIFICATIONS

Support to cylinder head 
M6X16 tightening torque  8 Nm
G14230411Courtesy of BMW OF NORTH AMERICA, INC.
TIGHTENING TORQUE SPECIFICATIONS

Cable bracket on rear cylinder head/transmission 
M6 x 20 Tightening torque  10 Nm
G14206968Courtesy of BMW OF NORTH AMERICA, INC.
TIGHTENING TORQUE SPECIFICATIONS

Cable bracket on rear cylinder head/transmission 
M6 x 20 Tightening torque  10 Nm
G14230526Courtesy of BMW OF NORTH AMERICA, INC.
G14296519Courtesy 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 SPECIFICATIONS

Battery positive lead to starter 
M8 Tightening torque  13.5 Nm

Follow-up work