Does anyone knows if mopar 2011 off-road bumper will fit on 2012 Rubicon. Here is the bumper i'm looking at.

MOPAR 82211715AC - MOPAR® Front Off-Road Bumper with Winch Mount & OE Fog Lamp Holes in Black for 07-11 Jeep® Wrangler & Wrangler Unlimited JK - Quadratec

 

Having installed one of those bumpers and skid plates on a 2011, I'd be blown away if it couldn't be used on a '12. It bolts up to the frame ends. I don't think the frame will change until the Wrangler moves from JK to whatever comes next. You could park next to a 2011 and look to see if the fog lights have changed.

 

The bumper itself looks like it should. You may run into an issue with the winch hitting the vacuum booster, which is probably why it isn't listed for the 2012. Most other bumpers that recess the winch require a relocation of the vacuum booster.

 

I had the Mopar Off-Road bumper (non-winch version) on my '09 Rubicon and had the dealer swap it over to mt '12 Rubicon when it came in. No issues with the fit, but you will need to make your own fog light extensions as the old ones won't work with the new low voltage fog lights.

 

It will work. I had the front and rears that I bought for my 2011 and did a test fit on the first 2012 that I owned.
You have to extend the fog lamp harnesses in both 2011 and 2012 which is simply cutting and splicing in some new wire which is included when you buy it new. For my 2012 I cut off the pig tail leaving about 2" and added an extra 12" of wire heat shrinking them back together.
Also, the vacuum pump did not interefere with my Warn M8000 and I did not need to relocate it.