Three problems related to brake disc caliper have been reported for the 2012 Jeep Wrangler. The most recently reported issues are listed below.
After a 30 mile trip, I discovered that the left front brake of my Jeep Wrangler was overheated, confirmed by a distinct burning smell, an extremely hot left front wheel, and a pulling sensation when brakes were applied. The next day, I took the vehicle to an authorized Jeep dealer for diagnosis and repair. I was told that both front brake calipers were "bad", and needed replacing. The vehicle has only 69,000 miles on the odometer. My 2012 Dodge journey had the exact same problem with the rear brake caliper.
The left rear brake caliper engages randomly. When engaged the vehicle is slowed somewhat. Sometimes there will be coming off the disc pads. I have noticed that I can clear the condition by following the hill start assist on/off procedure. A mechanic told me this is a computer failure and he can fix it for $1300. I think it is a serious safety issue.
The contact owns a 2012 Jeep Wrangler. The contact stated that while driving at 20 mph, the brake pedal was depressed but it took a greater amount of time to stop the vehicle. The contact had to engage the emergency brake in order to stop the vehicle. Upon further inspection, the contact noticed that a piece of the brake pedal had detached. The vehicle was taken to a dealer who diagnosed that the brake calipers needed to be replaced. The manufacturer was notified of the failure. The failure mileage was 76,000.