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Home >> BMW >> 2018 >> i3 Range Extender >> Repair and Diagnosis (Single Page) >> Hybrid/Electric Powertrain >> Battery Management Systems >> General Electrical System - Repair >> Auxiliary Cable, Repair Cable >> 61 12... Completely replace positive battery cable (range extender)
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61 12... Completely replace positive battery cable (range extender)

Necessary preliminary tasks: 

Take off cover and release nut (1) from positive battery cable on electrical machine electronics.

Tightening torque 12 36 3AZ .

Release positive battery cable from brackets.

Unfasten cable strap.

NOTE: Replace cable straps.
Fig 1: Locating Cable Straps
G11147576Courtesy of BMW OF NORTH AMERICA, INC.

Fold back cover (1).

Slacken nut (2).

Tightening torque 61 12 1AZ .

Release positive battery cable from brackets.

Unfasten cable strap.

NOTE: Replace cable straps.
Fig 2: Locating Cable Strap
G11147577Courtesy of BMW OF NORTH AMERICA, INC.

Installation note:

Latch mechanisms on the cover (1) must not be damaged or missing.

Fig 3: Identifying Latch Mechanisms On Cover
G11147578Courtesy of BMW OF NORTH AMERICA, INC.

If necessary, release cable strap at positive battery cable (1).

Fig 4: Locating Positive Battery Cable Strap
G11147579Courtesy of BMW OF NORTH AMERICA, INC.

Detach positive battery cable (1) from clamps (2) on range extender (3).

Feed out positive battery cable (1).

Fig 5: Detaching Positive Battery Cable From Clamps On Range Extender
G11144711Courtesy of BMW OF NORTH AMERICA, INC.

Release screw (1).

Fig 6: Identifying Screw
G11147581Courtesy of BMW OF NORTH AMERICA, INC.

Feed out cable (1).

Unfasten screws (2).

Feed out positive battery cable (3).

Fig 7: Locating Positive Battery Cable Screws
G11147582Courtesy of BMW OF NORTH AMERICA, INC.

If necessary detach cable strap.

Release positive battery cable (1) from the brackets along the side sill and feed out towards the front.

Fig 8: Locating Positive Battery Cable Strap
G11147583Courtesy of BMW OF NORTH AMERICA, INC.

Release positive battery cable (1) from brackets.

Feed out positive battery cable (1).

Fig 9: Locating Positive Battery Cable From Brackets
G11147584Courtesy of BMW OF NORTH AMERICA, INC.

Open cover on positive battery terminal (1) and slacken nut underneath.

Tightening torque 61 21 2AZ .

Remove positive battery terminal (1).

Unclip positive battery cable (2) from brackets.

Fig 10: Identifying Cover On Positive Battery Terminal
G11147585Courtesy of BMW OF NORTH AMERICA, INC.

Disconnect connector (1) on safety battery terminal (4).

Disconnect connector (2) on safety battery terminal (4).

Disconnect connector (3) on safety battery terminal (4).

Slacken nut (5).

Tightening torque 61 21 2AZ .

Feed out positive battery cable with safety battery terminal (4) towards the right wheel arch.

Fig 11: Identifying Connectors On Safety Battery Terminals
G11147586Courtesy of BMW OF NORTH AMERICA, INC.

Release nut on cable clip (1).

Lay down cable clip (1) on the side.

Release plastic nuts.

Feed out positive battery cable (2).

Fig 12: Locating Plastic Nuts
G11147587Courtesy of BMW OF NORTH AMERICA, INC.