Wire Repair
WARNING: This page is about a different car, the 2004 BMW X5. However, it is still accessible from the selected car via links, so may be relevant.
Repair only those cables which show visible signs of damage. If no visible damage can be identified, entire cable must be replaced. Use only BMW air bag cable kits. Only one crimping connector can be installed into a single wire. Wires cannot be lengthened as a result of the repair. Damaged wire or connectors in door wiring harness must be repaired by replacing the entire door wiring harness.