IMPORTANT: Comply with the following topics from "Body, General": Safety regulations .
Handling electrical system, electronics, airbags and restraint systems .
Set the MAG weld seams at equal intervals distributed on the face.
Areas which cannot be reached by the spot-welding tongs can be joined by MAG plug welding. The number of welding spots is doubled as a substitute for the omitted adhesive.
CAUTION: Extract smoke and fumes during welding work.
BMW X3 Service & Repair Manual > Troubleshooting: Instructions for removal and replacement of control units
IMPORTANT:
Disconnecting the vehicle battery will cancel the fault memories of control units.
Consequently, before disconnecting the car's battery, always interrogate the fault
memories. Investigate stored faults and, once any faults have been remedied, cancel the
fault memory. ...