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Home >> BMW >> 1998 >> 540i Automatic >> Repair and Diagnosis >> Engine Performance >> Ignition System >> Engine Electrical System - Repair Instructions >> Starter Lead >> 12 42 500 Removing And Installing Or Replacing Battery Positive Lead (Between Starter, Alternator And Battery Positive Support Point) (M60, M62) >> Cars With Primary Catalytic Converters Only (M62)

Cars With Primary Catalytic Converters Only (M62)

Release screws (1) in floor trim panel (2).

Press floor trim panel (2) down a little.

Fig 1: Identifying Screws In Floor Trim Panel
G03152912Courtesy of BMW OF NORTH AMERICA, INC.

Pull off cap (1) on battery positive lead.

Release nut on battery positive lead (2).

Disconnect battery positive lead (2).

Loosen screw (3).

Remove lead holder (4).

Release expansion rivet (5).

Pull panel (6) down a little.

Withdraw battery positive lead (2).

Fig 2: Identifying Battery Positive Lead
G03152913Courtesy of BMW OF NORTH AMERICA, INC.

Remove cover cap (1) on starter.

Unfasten nut (2).

Tightening torque, see 12 41 4AZ in ENGINE ELECTRICAL SYSTEM - TIGHTENING TORQUE .

Remove battery positive lead (3) from lead holder (4).

Withdraw battery positive lead (3).

Fig 3: Removing Cover Cap On Starter
G03152914Courtesy of BMW OF NORTH AMERICA, INC.

Unscrew bolts (1).

Remove shield plate (2).

Fig 4: Removing Shield Plate
G03152915Courtesy of BMW OF NORTH AMERICA, INC.

Unfasten cable connector (1).

Remove battery positive lead (3) from lead holders (2).

Fig 5: Removing Battery Positive Lead From Lead Holders (1 Of 2)
G03152916Courtesy of BMW OF NORTH AMERICA, INC.

Unfasten cable clip (2).

Remove battery positive lead from lead holders (1).

Fig 6: Removing Battery Positive Lead From Lead Holders (2 Of 2)
G03152917Courtesy of BMW OF NORTH AMERICA, INC.

Press press-stud fasteners (1...4) in succession and at same time raise acoustic cover slightly.

Remove acoustic cover once all four press-stud fasteners have been unlocked.

Installation 

  1. Position acoustic cover and press downwards until press-stud fasteners (1...4) click into place.
Fig 7: Identifying Press-Stud Fasteners On Acoustic Cover
G03152918Courtesy of BMW OF NORTH AMERICA, INC.

Remove seal caps (2) and release screws.

Remove cover.

Detach battery positive lead from battery positive support point (1).

Fig 8: Detaching Battery Positive Lead From Battery Positive Support Point
G03152919Courtesy of BMW OF NORTH AMERICA, INC.

Release nut (1) on alternator.

Tightening torque, see 12 31 1AZ in ENGINE ELECTRICAL SYSTEM - TIGHTENING TORQUE .

Remove battery positive lead (3) from lead holder (2).

Disconnect battery positive lead (3) from alternator.

Cut through cable straps between alternator and battery positive support point.

Remove battery positive lead (3) towards bottom.

Fig 9: Removing Battery Positive Lead From Lead Holder
G03152920Courtesy of BMW OF NORTH AMERICA, INC.

To facilitate assembly, bend connecting lead (2) to alternator 90 degrees prior to installation.

Observe markings (1) on battery positive lead during installation.

Fig 10: Markings On Battery Positive Lead
G03152921Courtesy of BMW OF NORTH AMERICA, INC.
  1. Insert battery positive lead (1) behind left engine support arm towards top.
Fig 11: Inserting Battery Positive Lead Behind Left Engine Support Arm
G03152922Courtesy of BMW OF NORTH AMERICA, INC.