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Home >> BMW >> 2021 >> 430i xDrive >> Repair and Diagnosis >> Accessories & Equipment >> Horns >> General Electrical System -- Repair (G22, G23 & G26) >> 61 21 Battery With Holder >> 61 21 003 Removing and installing the 12V dual storage system (4' Series coupe, convertible, and GranCoupe sedan) >> Installing the 12 V dual storage system

Installing the 12 V dual storage system

NOTE: Technical information 
Observe notes on 12V dual storage system.
See further information 6120... NOTES ON 12V DUAL STORAGE SYSTEM .
tightening torque specification

Positive battery terminal (12V dual storage battery)
Flange Nut M8 Tightening torque  19 nm
G14198385Courtesy of BMW OF NORTH AMERICA, INC.

Check 

G14198387Courtesy of BMW OF NORTH AMERICA, INC.

Result 

» guide (1) or snap-in lugs (2) are damaged.

Measure

tightening torque specification

Roll bar auxiliary battery to holder
Nut M8 Tightening torque  15 nm
G14198384Courtesy of BMW OF NORTH AMERICA, INC.

Follow-up work