I had what I thought was a problem with the main switch, turned out to be a door harness plug issue... Ordered this via eBay and it's unneeded at this point. I am unsure of exact model exchange but I know it works on my 2010 III and 2012 IV. $20 shipped to your door with a smile via USPS
Yes it is. Short on time this am, but send me a message with what methods of payment you would like to do and I'll get on a response as soon as I can today.