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seems to be problem with bluetooth/usb or the way iOS11 works
try turn bluetooth completely off (in setting) before connecting usb cable. Otherwise, update the head unit

I have a Pioneer X8650BT on my car. It used to work fine with iOS10. The other day I updated my 6S to iOS11 and it stopped working completely (plugged cable in and nothing happened). Problem is solved by updating the head unit's firmware (took freaking 8 hours)
You're very fortunate that Pioneer actually does updates for their receivers. Many manufacturers simply don't....it's pretty rare.

Hyundai/Kia has a wholly owned subsidiary called Modis that makes some of their receivers. Notorious for never doing a firmware update after they're shipped. (it's why I put an Alpine in mine) - but even them, being solely a CarPlay deck, there's been issues with iOS 11.

@happyslayer - best advice I can give is to find out how to get into the setup screens for your decks and find enough information to be able to google which manufacturer it is that actually made your receivers. Then you can follow up with the manufacturer and see if they have any firmware updates.
 
I own an iPhone 7 Plus and a 2017 Nissan Maxima.

CarPlay worked like a charm on iOS 10.3.3, but ever since I updated to iOS 11 it’s been a bad experience.

It either doesn’t connect at all, drops connection constantly, or if it does stay connected for more than a few minutes, refuses to charge my phone. I use an official Apple Lightning Cable, so thats not it.

I’ve also tried resetting network settings, resetting my car’s audio settings, and turning Siri on/off. No change.

I also downgraded back to 10.3.3 and it went back to working normally, so it’s gotta be iOS 11.

Anyone with any ideas? I’m stuck on iOS 11 now because I updated my watch and don’t want to send it back just to downgrade its firmware. I hope there’s a solution out there besides waiting for iOS 11.0.1.

Thanks!
[doublepost=1511671145][/doublepost]I am So glad I am Not the only one. My girlfriend did not upgrade to iOS 11 and car play works great. I uploaded Now when I plug In nothing happens. I have To unplug so i can use booth for phone calls. What did a-pile do.. this would have never happened under Steve jobs. Apple is becoming more and more like Microsoft everyday. Shame.. when are they going to put a fix out for car play.
 
It worked just fine on 10.3.3, so its this new software... And FYI, The Maxima doesn't support Android Auto, just CarPlay
you might want to ask your dealer if there’s an update for your car. i’ve been using carplay from 10.3.3 to the latest 11.2 beta with no issues.
 
Same here. VW Golf 2016, worked wonderfully. Now Siri will not read my texts, and the Mic Button on the steering wheel no longer works for Carplay commands. It's all BROKEN since iOS 11.

I have a ‘17 VW Golf Alltrack. CarPlay worked very nicely until updating to iOS 11.1.2. With the update installed, the only way to sent an iMessage is to yell over the radio playing as the Siri button on the steering wheel no longer works. Sometimes Siri hears the talking from the radio and texts what it hears the DJ saying.
When receiving a text, I can no longer push the little arrow on the radio screen that prompts Siri to read the message.
Downgraded back to iOs 11.1.1. This brought back my steering wheel button which was a big help. Still can’t push little arrow when a text comes in to have messages read.
Caution : if you own an Apple Watch, don’t upgrade the watch, it also effects the software on the iPhone as it downloads through the iPhone, which in turn messes up CarPlay. Found this out the hard way, had to downgrade twice.

I hope Apple fixes these issues soon.

Any other VW owners with similar experiences?
 
My '17 VW Jetta doesn't have those problems. I don't have a watch so maybe that sync makes a difference.
 
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