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Home >> BMW >> 2021 >> M440i >> Repair and Diagnosis >> General Information >> OEM General Information >> General Orphan Data (3 Of 3) >> Installing the left and right backrest side section

Installing the left and right backrest side section

NOTE: Description is for left component only. Procedure on the right side is identical.

Install backrest side section 

Installing the backrest side section with the side airbag 

WARNING: Airbag unit. 
Danger! Immobilization period-threatening injuries! 
WARNING: Pyrotechnic components. 
Danger! Immobilization period-threatening injuries! 
NOTE: To provide a better overview: Schematic diagram with partially hidden components.
TIGHTENING TORQUE SPECIFICATION

Backrest side section with side airbag 
M6x20
Replace screw.
tightening torque  8 Nm
G14644535Courtesy of BMW OF NORTH AMERICA, INC.

Activate electrical system 

NOTE: TECHNICAL INFORMATION 
The vehicle-specific specifications described in the further information must be followed!
G15581952Courtesy of BMW OF NORTH AMERICA, INC.

Activating the 48 V electrical system 

Precondition 

Ignition is switched off.

NOTE: RISK OF DAMAGE 
Damage to the 48-V battery 
If a 48-V battery that is disconnected from the electrical system is activated, the battery electronics will be damaged. 
  • Only ever activate the 48 V electrical system when the 48 V battery is fully connected up.
TIGHTENING TORQUE SPECIFICATION

Negative battery cable to 48-V battery 
Nut M8 tightening torque  19 Nm
G14192780Courtesy of BMW OF NORTH AMERICA, INC.
G14192798Courtesy of BMW OF NORTH AMERICA, INC.