Guide to 2014-2021 Mazda 6 CV Axle Shaft Replacement
Hearing a clicking or popping noise when you turn? It might be time to inspect your CV axle shafts.
- A clicking noise when turning is the number one sign of a bad CV axle on a Mazda 6.
- Check for torn boots and grease splatter on the inside of your front wheels.
- Replacing the entire axle assembly is usually a better long-term solution than just replacing a torn boot.
- No recalls are currently active for the 2014-2021 Mazda 6 CV axles; failures are typically from wear.
Is Your Mazda 6 CV Axle Failing?
A CV axle doesn't typically fail suddenly. It usually wears out over time, giving you warning signs. The most common cause of failure is a torn or damaged CV boot. When the boot rips, the grease that lubricates the joint leaks out, and dirt and moisture get in. This contamination quickly ruins the sensitive joint, leading to the symptoms below.
Symptoms of a Bad CV Axle
- Clicking or Popping Noise When Turning: This is the most classic sign. The noise comes from the worn-outer CV joint and is most noticeable during sharp, low-speed turns.
- Vibrations While Driving: A damaged inner CV joint can cause a noticeable vibration that gets worse with acceleration. You might feel this in the steering wheel or through the floor.
- Grease on the Inside of Your Wheel: If a CV boot is torn, it will sling dark, heavy grease onto the inner surface of your wheel, tire, and surrounding suspension parts.
Known Issues, Recalls & TSBs
As of early 2026, there are no specific recalls or widespread Technical Service Bulletins (TSBs) from Mazda or the NHTSA for CV axle shaft failures on the 2014-2021 Mazda 6. Problems with these parts are generally due to normal wear and tear or damage to the protective boots.
Choosing the Right Aftermarket CV Axle
When it's time for a replacement, you'll find both OEM (Original Equipment Manufacturer) and aftermarket options. While OEM axles from Mazda offer a guaranteed fit and quality, they can be expensive. Aftermarket axles provide a more affordable solution, but quality can vary.
For many drivers, a quality new aftermarket axle is a smart choice. Brands like Surtrak offer new axles that are designed to meet or exceed original specifications. These parts are completely new, not rebuilt, and often come with a lifetime warranty, providing peace of mind at a lower cost. Some forum users have noted that very cheap, unbranded aftermarket axles can sometimes cause vibration issues, so it's wise to choose a reputable brand.
Replacement Cost for a 2014-2021 Mazda 6 CV Axle
The cost to replace a CV axle can vary based on your location and whether you do the work yourself or hire a professional. Below is a general cost estimate.
🎬 Watch this step-by-step guide to replacing the axle yourself.| Part/Service | Estimated Cost |
|---|---|
| New Aftermarket CV Axle | $95 - $225 |
| New OEM CV Axle | $380 - $725 |
| Shop Labor | $150 - $400 |
| Total Professional Job (Aftermarket Part) | $245 - $625 |
Frequently Asked Questions
Can I just replace the torn CV boot?
Yes, you can buy CV boot kits. However, if the joint has been clicking or making noise, it's already damaged from contamination. Replacing only the boot at that point won't fix the noise, and the joint will likely fail completely soon. It's usually more time and cost-effective to replace the entire axle shaft assembly.
🎬 See how to remove and install a new axle assembly.Is the driver's side axle the same as the passenger's side?
No, they are not the same. The left (driver's side) and right (passenger's side) CV axles are different lengths and have different designs. Be sure to order the correct side for your vehicle.
How long does a CV axle last?
An original CV axle can last over 100,000 miles if the protective boot remains intact. Once the boot is damaged, the life of the axle is shortened dramatically. Aftermarket axle lifespan can vary, but quality brands often last for many years.
What happens if a CV axle breaks completely?
If a CV axle breaks while you are driving, your car will lose power to that wheel. The car will not be able to move under its own power, and you will be stranded. It can also cause damage to other nearby parts, so it's critical to replace a failing axle before it breaks.
Helpful Videos
Technical Specifications
OEM Part Numbers: FTB6-25-60X FTB6-25-50X GDB6-25-60X GDB6-25-50X
The CV axle assembly includes inner and outer CV joints, a connecting shaft, and protective neoprene boots. Axles are specific to the driver (left) and passenger (right) side and may differ between automatic and manual transmissions.
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The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.
- Mazda 6: