Connects2 CT25BM11 BMW 5 Series 2011> Rear Door 20cm 8" Speaker Adapters
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Connects2 CTSBM015.2 Steering Wheel Stalk Adapter for BMW 1 2 3 4 Series 2012>
Connects 2 CAN-Bus interface leads make it possible to update your existing factory head unit to a new model whilst still retaining use of your stalk/steering wheel audio controls.