Air Conditioner problems of the 2006 Hyundai Sonata

It all started with 3 bad alternators. The alternator was replaced 3 times in 2 years all brand new alternators. In those 2 years the car had trouble starting in interments. Turning the key 5-6 times the car will eventually start. Recently the car's headlights, air conditioning, and radio turn off when the car is slowing by applying the brake. Computer prompted no code for a problem. I have read about these same issues with the same make, model, and year. What is the malfunction?.

2006 Hyundai Sonata. Consumer writes in regards to replacement of drive belt issues. The consumer stated there were no issues with the vehicle, prior to the drive belts being replaced. A few weeks after the belts were replaced, the vehicle was not performing well when driven. There was hardness on the accelerator pedal, there was a slight, faint chirping, faint grinding sound when the a/c was turned on. The manager informed the consumer, the noise was coming from the a/c/panel and maybe a loose flap. However, the noise continued. The vehicle was returned to the mechanic, who inspected the vehicle and discovered the belt that was installed was not the correct one for the vehicle. However, after the original belt was installed the noise was still present, but not as loud. Also, the struts were replaced due to hearing a noise when going over bumps.