2012 Mazda 3 Cv Axle Replacement: A Comprehensive Guide

CV Axle Shaft Front LH Left Driver Side for Mazda 3 Mazda3 Speed Turbo
CV Axle Shaft Front LH Left Driver Side for Mazda 3 Mazda3 Speed Turbo from www.ebay.com


If you own a 2012 Mazda 3 and are experiencing issues with your CV axle, it might be time for a replacement. The CV axle, also known as a half shaft, plays a crucial role in transferring power from the transmission to the wheels. Over time, CV axles can wear out and lead to problems such as clicking noises, vibrations, or loss of power. In this article, we will provide you with a step-by-step guide on how to replace the CV axle in your 2012 Mazda 3.

Step 1: Gather the Necessary Tools

Before you begin the replacement process, make sure you have all the required tools. These include a jack, jack stands, a socket set, a pry bar, a torque wrench, a mallet, and a new CV axle compatible with your Mazda 3.

Step 2: Prepare the Vehicle

Park your Mazda 3 on a flat surface and engage the parking brake. Loosen the lug nuts on the wheel where you will be replacing the CV axle, but do not remove them just yet. Place the jack under the vehicle’s frame and lift it until the wheel is off the ground. Secure the vehicle on jack stands for added safety.

Step 3: Remove the Wheel and Brake Caliper

Using the socket set, remove the lug nuts and take off the wheel. Next, locate the brake caliper and remove the bolts that secure it to the rotor. Carefully disconnect the caliper from the rotor and hang it using a wire or bungee cord to prevent damage to the brake line.

Step 4: Disconnect the Tie Rod End and Lower Ball Joint

Locate the tie rod end and remove the cotter pin securing it. Unscrew the castle nut and use a pry bar to disconnect the tie rod end from the steering knuckle. Proceed to the lower ball joint and remove the cotter pin and castle nut as well. Use the pry bar to separate the ball joint from the control arm.

Step 5: Remove the Axle Nut and Hub Assembly

Locate the axle nut at the center of the wheel hub assembly. Use the socket set to remove the nut and set it aside. Now, you can remove the hub assembly by gently tapping it with a mallet until it comes loose. Be careful not to damage the threads or the wheel bearing.

Step 6: Remove the Old CV Axle

With the hub assembly out of the way, you can now remove the old CV axle. Grip the axle firmly and give it a firm pull or use a pry bar to dislodge it from the transmission. Be prepared for some resistance, as the axle might be stuck due to corrosion or other factors.

Step 7: Install the New CV Axle

Take the new CV axle and slide it into the transmission. Ensure that it is properly seated by giving it a gentle tug. Align the splines on the axle with the splines inside the hub assembly and carefully insert it. Make sure it goes all the way in and engages fully.

Step 8: Reassemble the Components

Reverse the steps to reassemble all the components you previously removed. This includes reinstalling the hub assembly, securing the axle nut, reconnecting the tie rod end and lower ball joint, and reattaching the brake caliper. Make sure all the bolts are torqued to the manufacturer’s specifications.

Step 9: Repeat for the Other Side

Once you have successfully replaced the CV axle on one side of your Mazda 3, repeat the entire process for the other side. It is recommended to replace both CV axles simultaneously, even if only one is showing signs of damage or wear.

Step 10: Test Drive and Final Checks

Lower your Mazda 3 from the jack stands and remove them. Tighten the lug nuts on both wheels and take your vehicle for a test drive. Pay attention to any unusual noises, vibrations, or handling issues. If everything feels normal, your CV axle replacement is complete!


Replacing the CV axle on your 2012 Mazda 3 might seem like a daunting task, but with the right tools and a little patience, it can be accomplished. By following this comprehensive guide, you can save money on labor costs and ensure that your Mazda 3 continues to run smoothly. Remember to always prioritize safety and consult a professional if you are unsure about any step in the process.