I haven't had to used the jack on my car yet. Now that I want to use it nothing has broke. But, I have used it on a buddy's car. He has a xxxxxx car and has a Chinese knock off of this jack. His Broke. Just like his car does every trip. He even scratched his head and admitted the superior nature of the AGM Jack. I also have the new plug kit. Haven't had to use that yet either but I am a pack rat and like that kinda stuff. As always, I am happy with AGM products.