Replacing a U-joint can cost anywhere from under $100 to several hundred dollars, depending on whether you take it to a shop or do it yourself. Shop labor is often the biggest chunk of that bill, and it’s also the part you can skip entirely with basic tools and a few hours in the driveway.

This guide breaks down what U-joint replacement actually costs, walks you through the DIY process step by step, and shows you how to pick the right part for your vehicle. We’ll also cover the warning signs of a failing U-joint, so you know exactly when it’s time to get started.