3.5 audio for car with iphone 17 Pro

I'd never had a problem with the Belkin Rockstar lightning/audio splitter for the car, but now the 3.5mm audio + USB-C won't pass through audio from my new iphone 17 Pro. Any adaptor known to actually do this?

iPhone 17 Pro, iOS 26

Posted on Oct 4, 2025 11:28 AM

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5 replies

Oct 14, 2025 10:53 AM in response to Barry M

I have also used that adapter to listen in the car (Fiio DAC connected to car audio) while charging. Has been working for years. Up until I upgraded my phone (iPhone 14 pro) to IOS 26. Now the charging over the adapter still works. But the audio keeps coming out of the phone speakers and not from the car audio. The power led on the Fiio DAC is lit though. Connected on its own the DAC works. But no longer via the Belkin Rockstar adapter. I have no other Apple devices on older IOS to confirm, but I suspect it’s a bug in IOS 26.

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3.5 audio for car with iphone 17 Pro

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