You'll only be able to retain your steering wheel audio controls with a compatible car stereo made by Alpine, Blaupunkt, Clarion, Jensen, JVC, Kenwood, Pioneer, or Sony. No other brands are currently compatible. Check the Details tab to see if steering wheel audio controls are retained in your vehicle.
Crux's SWRFT-53 interface ensures that you can keep the steering wheel audio controls and the factory speaker system in your Fiat when you replace the factory radio. Connect this interface to the wires on your new stereo's wiring harness, and you've covered the power, ground, and factory speaker connections for your new stereo. The adapter will also retain the factory amp if your Fiat came with the Bose® system.
The SWRFT-53 interface also offers the illumination, reverse, and Vehicle Speed Sensor (V.S.S.) outputs that you'll need if you're installing a navigation receiver.