Emergency (Fail Safe) Lighting

1999 BMW 328i 2D Convertible, AutomaticSECTION Emergency (Fail Safe) Lighting

The LSZ provides emergency lighting in the event of a control module failure. If the processor of the LSZ control module fails, back up hardware will allow the following lighting circuits to function:

  • Low Beam Headlights
  • Tail Lights
  • Parking Lights
  • Brake Lights

The headlights and tail lights will come on as soon as KL 15 is switched on, the brake will operate when the brake pedal is pressed.

Fig 1: LSZ Control Module Emergency (Fail Safe) Lighting Function
G03395642Courtesy of BMW OF NORTH AMERICA, INC.
RENDER: 1.0x

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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.