For the most part, car jacks are extremely safe to use when placed on flat ground, at the proper lift points and using the appropriate additional equipment. However, this doesn’t mean you are 100% protected from your car failing on you while using a car jack. If the jack is old or damaged, your risk for failure is higher. And there’s always a chance that your car can slide on the jack while doing maintenance. It’s of critical importance to follow safety standards when using a car jack.