I heard slack adjuster in a car can play a role can not be ignored. Slack adjuster is used to imprison the brake function, adjust the gap. I also listen to a work in manufacturing slack adjuster factory friend said. He said that every day they plant to produce large amounts of the slack adjuster, otherwise, the supply is not on the requirements of customers. He also advised me every month to 4S stores to do the maintenance, performance and let the repair personnel to help me check the car, especially the brake performance, it is mainly to check the slack adjuster is intact, if it failed, it is easy to cause brake failure. I heard my friends say this, so I every month on time to the 4S store to check the car.