3 versions of Bluetooth exist 2.0 3.0 and 4.0 ,4.0 being the newest the module in your car is probably a gen 3 very early with Bluetooth 2.0 you can try downloading a Bluetooth app from the play store that will bridge between devices ideally if you pick up a gen 13 Bluetooth module this should work with the iPhone 5 have you tried any other phones ? And have you tried to connect the iPhone to any other Bluetooth source


Just rereading your post it looks like you might have a faulty module you could try getting germaniks to run a diagnostic on it and see what the issue is