2003 BMW Z8 BaseFACTORY OEM SERVICE PROCEDURE

The Battery: Notes

Model: AllΒ 

Production Date: AllΒ 

Fig 1: View Of Electrical Components Connected To Battery
G03390172Courtesy of BMW OF NORTH AMERICA, INC.

Purpose of the Automotive Battery:Β 

The battery is the primary EMF source in the automobile. In addition the battery performs the following functions:

  • Provides voltage and current for the starter motor.
  • Provides voltage and current for the ignition during cranking.
  • Supplies all electrical power when the charging system is not operating.
  • Supplies the extra power necessary when the vehicle's electrical load exceeds the supply from the charging system.
  • Acts as a voltage stabilizer in the electrical system. The battery evens out voltage spikes and prevents them from damaging other components in the electrical system.
  • Provides power to KL30, KL15 and KLR.

The battery does not store electrical energy. It stores chemical energy that is converted to electrical energy as it discharges.

Factory Service Tools

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.