I would of thought that as long as you ahve a normal 3.5mm jack lead on either end it'll work with anything that supports that as an input.
The FM transmitter modules that you plug into the iphone to then receive via the cars radio, for the general are a waste of time. All the ones that Ive tried from cheapo brands to belkin mean you have to ramp up the volume on your iphone and then on the radio to the point that anythin on the music or podcast really stands out.
The best ones Ive found are the cassette adaptors, cumbersome but they work