theres loads of resistor tricks that can be done to bypass this error and its cheap you only need a few resistors.. type in google.com "bmw airbag resistor trick".

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2007 X5 4.8i - Sapphire Black
Specs: Aero kit/Pan roof/20" Y Spoke/HUD/Active seats/Heated seats/Comfort seats/Vent perf seats/Bi Xenons/ Navigation/Bluetooth/
Mods: OEM LED number plate lights/ Pheonix Gold Subwoofer/ Solar Guard Window film/Digital TV/ I Pod Kit