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Home >> BMW >> 2021 >> 740i >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Engine Electrical System - Engine Wiring - Repair (G12) >> 12 51 Engine Wiring Harness >> 12 51 301 Remove and install/replace engine wiring harness section, ignition module cylinder 5-8 (750i xDrive 2016-2022) >> Installing wiring harness section for ignition system of bank 2

Installing wiring harness section for ignition system of bank 2

Wiring harness section for the ignition system of cylinder bank 2 

G14262065Courtesy of BMW OF NORTH AMERICA, INC.
TIGHTENING TORQUE SPECIFICATIONS

Ground cable to hold-down device
Nuts Tightening torque  5.5 Nm
G14262058Courtesy of BMW OF NORTH AMERICA, INC.
NOTE: Schematic diagram is for example purposes. Some parts may differ in certain details.
G11087075Courtesy of BMW OF NORTH AMERICA, INC.

Install the ignition coils of cylinder bank 2 

Precondition 

Ignition is switched off.

NOTE: RISK OF DAMAGE 
Damage to the ignition coil. 
The silicone hose of the ignition coil must not be contaminated by fuel as this can lead to failure of the ignition coil. 
  • When working on the fuel system, cover the ignition coils with suitable materials and remove where required.
  • Do not oil or grease the silicone tube of the spark plug socket. Do not  use any protection or maintenance products (e.g. silicone spray, rubber care products, rust remover, etc.).
TIGHTENING TORQUE SPECIFICATIONS

Ignition coil
screw Tightening torque  8 Nm
G14262069Courtesy of BMW OF NORTH AMERICA, INC.
TIGHTENING TORQUE SPECIFICATIONS

Wiring harness on the cylinder head cover
M6x16 screw Tightening torque  10 Nm
Nut M6 Tightening torque  10 Nm
G14261821Courtesy of BMW OF NORTH AMERICA, INC.
TIGHTENING TORQUE SPECIFICATIONS

Wiring harness on the cylinder head cover
M6x16 screw Tightening torque  10 Nm
Nut M6 Tightening torque  10 Nm
G14261820Courtesy of BMW OF NORTH AMERICA, INC.

Follow-up work