On or about 2/8-2/13/2025, I was on my way home when suddenly, without warning, I applied my brakes to slow down and the brake pedal was so hard, so stiff that even while I was literally standing on the pedal, I was unable to stop. I nearly rear-ended the vehicle in front of me. I was honking , and honking to get the car to move and thank God without another second to waste, he moved over. I could not stop the car, I had to let off the gas and let it coast to a stop. I called a mechanic friend and he towed my car in. My car is not under warranty any more therefore Alan, my mechanic friend went over my car and determined my Vacuum Brake Booster failed. I did do some research along with the mechanic and found that the Chevy Equinox (several yrs, including mine) had a recall for this same exact problem. I ran my VIN and my car is not included in the recall. The mechanic believes my car should be recalled for the brake system being faulty and he installed the new Vac Brake Booster. Now on 4/12/2025, only 2 months later, the same thing happened, my pedal is hard and I can’t stop. The first time I felt like I was going to crash, kill myself or somebody else. The 2nd time I had to exit the roadway where there was only dirt, I ended up nearly flipping my car because the dirt caused me to nearly lose control. Again, I escaped causing a crash but at the risk of my own life by not being able to stop and having to leave the roadway to avoid a collision. I had the same mechanic, along with a family member who is experienced enough to understand what the mechanic showed him. It is the vac brake booster, the same part I just replaced, it failed. Without warnings, without any other factors that can explain what is causing this system to fail. I have not replaced this part again because I believe it is faulty by the GM factory and it will keep happening. I am scared it will continue to cause brake failure and I could potentially cause an accident that could be fatal.