A defective AC compressor clutch assembly can cause excessive noise or vibration when the air conditioning is on. Improved parts are available. Replacing the faulty clutch assembly does not necessitate replacement of the complete AC compressor or evacuation and recharging of the air conditioning system.
2011 Kia Sportage Problem Reports
Most Reported 2011 Kia Sportage Problem Reports
When you get into the car everything works fine untill you try to start it. Some times it starts after a few ties, but increasingly the few tries turn into 20 minutes, into not at all.
The solution: Replace the faulty brake switch. This should be a recall. Just research it online and you will see there are many people with this exact same problem.