This is not some sort of current/amperage problem where a new wire is providing ability to carry more current. If it were a current problem the wire would show it and not a disintegration of the much more current capable metal contact spade plug.

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2008 535xi:
Sport, Night Vision, NAV, PDC, HUD

Mods
Rear Seat Heat Retrofit, Passport 9500ci, HD Radio Retrofit
Shock Sensor Alarm, Sport Automatic Retrofit , Active Backrest Retrofit, Fire Extinguisher, PROcede with Meth Injection