Audi RS5 (2013-2015) CV Axle Shaft Replacement Guide
Diagnosing clicks, pops, and vibrations to choose the right replacement axle for your RS5.
- The most common failure symptom is a clicking noise when turning, which points to a bad outer CV joint.
- Aftermarket axles are a cost-effective fix, but genuine OEM axles offer superior quality, refinement, and durability for a high-performance vehicle.
- The large center axle bolt is a one-time-use stretch bolt and MUST be replaced to ensure safety.
- Before replacing the axle for a single 'pop' noise, investigate TSBs related to axle spline movement, which may only require an adhesive fix.
Signs of a Failing CV Axle Shaft
A bad CV axle almost always means a worn-out CV joint. The first sign is usually a torn rubber boot, which allows the special grease inside to leak out and lets dirt and water in. Once the joint is contaminated, wear happens quickly. Watch and listen for these symptoms:
- Clicking or Popping Noise When Turning: This is the most common sign of a bad outer CV joint. The noise is most obvious in low-speed, sharp turns like in a parking lot. It will get faster as you accelerate through the turn.
- Vibration When Accelerating: A shudder or vibration that you feel through the car as you speed up can point to a problem with the inner CV joint. This may feel similar to an unbalanced tire but only happens during acceleration.
- Clunking Sound: A distinct 'clunk' when you shift from drive to reverse, or when you get on or off the gas, can mean there is too much play in a worn inner CV joint.
- Grease on the Inside of Your Wheel: If you see dark, thick grease splattered on the inside of your wheel or on suspension parts, the CV boot has likely torn. This is a clear warning that the joint is now exposed to contamination and will fail soon if not addressed.
Is It Really the Axle?
Some issues can be mistaken for a bad CV axle. A single 'pop' noise when shifting between drive and reverse is a known issue on some Audi platforms, often caused by movement between the axle splines and the wheel hub. This is sometimes fixed by applying a special adhesive, not by replacing the axle. Before replacing parts, it's important to get an accurate diagnosis.
Choosing the Right Aftermarket Part: OEM vs. Aftermarket
When replacing a CV axle on your RS5, you have a choice between expensive Original Equipment (OEM) parts and more affordable aftermarket options.
OEM / Genuine Audi Axles
Genuine Audi axles (often made by GKN) are engineered specifically for your vehicle. They are built to a high standard, using top-quality materials and including features like a rubber balancer on the shaft to absorb vibrations. The main drawback is the extremely high cost, which can be over $1,000 per axle. For a high-performance car like the RS5, many mechanics and enthusiasts recommend sticking with OEM to maintain the original ride quality and ensure durability.
Aftermarket Axles (Surtrak)
Aftermarket brands like Surtrak offer a much more affordable solution. These are brand-new axles designed to fit and function like the original part, meeting basic OEM standards. They are a practical choice for owners on a budget. However, it's important to understand the trade-offs. Low-cost aftermarket axles may use different materials, might not last as long as the original, and typically do not include the vibration-damping balancer found on the factory part. While they will get your car back on the road safely, some drivers report noticing new, subtle vibrations after installing budget aftermarket axles.
Cost of Replacing an Audi RS5 CV Axle Shaft
| Part/Service | Estimated Cost |
|---|---|
| New Aftermarket CV Axle (Surtrak) | $193 - $362 |
| New OEM CV Axle | $530 - $1700+ |
| Shop Labor | $250 - $550 per axle |
| Total (Aftermarket Part + Labor) | $443 - $912 |
| Total (OEM Part + Labor) | $780 - $2250+ |
Frequently Asked Questions (FAQ)
Can I replace just one CV axle, or should I do them in pairs?
You only need to replace the axle that has failed. CV axles are not a component that needs to be replaced in pairs like brake pads or tires. Inspect the other axles for torn boots or play, but only replace what is necessary.
What's the difference between inner and outer joint failure?
The symptoms are different. A worn outer joint typically makes a clicking or popping noise when you are turning. A worn inner joint is more likely to cause a vibration or clunking sound during acceleration.
Why is the OEM Audi axle so much more expensive?
The cost reflects higher quality materials, stricter manufacturing tolerances, and features like a finely-tuned vibration damper that are often omitted from cheaper aftermarket parts. For a high-revving, powerful car like the RS5, these details can make a difference in smoothness and longevity.
Is there a recall for the 2013-2015 RS5 axle?
No, there are no recalls for the CV axle shafts on this vehicle. There was a recall (NHTSA 21V-295 / Audi 42L1) related to the rear axle assembly, but it involved a lock nut on the suspension, not the drive axle itself. This issue could cause wheel misalignment but is unrelated to CV joint failure.
Technical Specifications
OEM Part Numbers: 8K0407271AJ
The main axle bolt is a one-time-use stretch bolt. The torque specification is 200 Nm (147 ft-lbs) plus an additional 180-degree turn. Replacement requires triple-square (XZN) sockets for the inner flange bolts.
We Have This Part in Stock
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.
- Audi RS5: