Can Android Auto app connect to car dashboard device running Android 4.4? Does the Android Auto app require Android 5 on the car dashboard that it is streaming data to?

(Phone has Android 5)
Based on this tweet from Android,

Get #AndroidAuto today w/ Pioneer products &amp; an Android 5.0+ device; now available in US, UK &amp; AU. More partners coming soon.

So you'll need three things,

Android Auto compatible head unit.
For example, the  Pioneer AVIC-8100NEX Navigation receiver head unit

An Android phone running Lollipop or higher versions.

Also, you need a compatible cable to connect the head unit to your Android smartphone.



You'll also need a compatible microUSB cable such as the Pioneer
CD-MU200 cable (or a similar microUSB-to-USB cable) to connect the
phone to the receiver.