Generation 1 Chevy Volt (2011-2015)
I have added a few after-market gizmos to my Volt. My best purchase was a backup camera. It was expensive, and I had the dealer install it, but I've never regretted the purchase, as I feel it makes my Volt much safer. And I bought an Anker Roav dash cam, in a kind of spur-of-the-moment thing...