How much does it cost to replace my serpentine belt? Well that depends on why it needs to be replaced. Is it just old and worn out? Is is make a squealing noise? Is it broken? If it is just old and worn out, we should probably replace the belt, along with tensioner and pulley as they wear out like the belt does. If it is squealing, why? Does it need to be tightened up, or replaced? If it is broken, why did it break, did something seize up, or was it just old? We need to take into consideration all of these variables, plus the cost of any of these scenarios is going to vary depending on the year, make and model of your vehicle. If you are having any of these issues, give us a call and we will help you figure out the next best course of action.