I have a 2005 liberty CRD with spongy brakes. Im sure it was a gradual change but i noticed it back in june and stopped driving it in July because of how bad it was and I wasnt comfortable driving it with the kids. My husband is a diesel mechanic and we have done everything possible to fix this problem and we just replaced all the brake lines with stainless steel braided hoses and there has been no change. He has replaced everything except the vacuum booster. Everything. Calipers, brake pads, master cylinder and all brake hoses. The pedal is nearly all the way in before it actually does what it is suppose to do. I love my jeep and planned on driving it until the rust claimed it. Now im stuck driving the mini van. What are we missing? Please help!