BMW X3 Service & Repair Manual: Contents of engine electrical system general

BMW X3 Service & Repair Manual / Electrical / Troubleshooting / Contents of engine electrical system general

General Information

  • WORKING ON IGNITION SYSTEM
  • REMOVING AND INSTALLING ELECTRONIC CONTROL UNITS
  • WELDING WORK (overload protection of control units)
  • Disconnecting and connecting battery
  • DISCONNECTING AND CONNECTING TEST EQUIPMENT
  • COMPONENT INSPECTION
  • EXTERNAL JUMP-STARTING AID
  • Compression testing

HANDLING COMPONENTS AFTER FLOOD DAMAGE

Flood damage can occur if the permissible fording depth of a vehicle is exceeded. Ingress of water can cause damage to the engine (water shock) or components.

Because dirt particles generally enter into the component with the water (e.g. starter motor, wiring harness), the components need to be thoroughly inspected.

Residual moisture in the components leads to corrosion (increased contact resistance in the component), which can lead to a component failure at a later time.

If water ingress into the electrical components cannot be ruled out, it is recommended to replace the component to ensure correct functioning through the vehicle lifetime.

    Butt connector for repairing a plug connection
    Special tools required: 61 0 300 61 4 340 61 0 240 IMPORTANT: Identify cause of damage (e.g. sharp-edged body components, faulty e ...

    Instructions for welding work (overload protection of control units)
    CAUTION: Follow instructions for body repairs. When performing welding work on installed control units, to avoid any defects in the electronic cont ...

    Other materials:

    BMW X3 Service & Repair Manual > Transmission in general: Removing and installing automatic transmission (GA8HP45Z) (N55)
    Special tools required: 24 4 161 24 4 166 24 4 160 24 2 390 23 4 050 00 2 030 24 1 110 IMPORTANT: To prevent heavy damage to the engine block, the protruding thread of the transmission bolts absolutely must be checked for damage and corrosion before removal. If there are ...

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