Replacing Your Car Battery Terminals: Get Ready To Spend! If you decide to do the work yourself or go to a mechanic, the cost of replacing your car’s battery terminals can vary greatly. In general, the cost of replacing battery terminal connectors ranges from $26 to $33, not including taxes, fees, or your specific vehicle’s specific cost. Our service team is available 7 days a week, Monday - Friday from 6 AM to 5 PM PST, Saturday - Sunday 7 AM - 4 PM PST. How much does Car Battery Cable Replacement cost? Get an estimate instantly. Service, parts, cost & recommendations from YourMechanic. Your definitive guide to Car Battery Cable Replacement. the positive terminal is pretty straightforward to change, theres one 12mm nut that holds it to the entire cable on top. u may need to hold the terminal with something while u loosen the nut to keep the whole cable from turning. the terminal u can buy for $12 at the dealer. E. Step 1: Find the car battery. Put the car in park, turn it off, and remove the key. Before you locate the battery, make sure the engine has cooled down. Most car batteries are in the front, mounted on a plastic or metal tray, under the hood. Some cars have the battery in the trunk. Learn how to change your car battery in a few simple steps. Before you begin, you'll want to assemble your tools and make sure no metal objects are touching Attach the Terminal Nuts. The last step is to attach the terminal nuts. Use a rag or towel to put the positive and negative terminals back on the node. Use a wrench to tighten the side nut of the negative terminal. Repeat the steps for the positive terminal to complete battery terminal replacement. Have you ever replaced your battery but could not get the clamp tight on the post? Well then THIS video is for you! Please watch and then click the like butt Assuming you are referring to a car battery, the tools you will need to replace the terminal are: -A wrench to remove the old terminal -A wire brush to clean off any corrosion from the battery post -A new battery terminal -A hammer to attach the new terminal (if it is a clamp-type) -Cable ties (optional) oG5g.