In a Subaru Outback, replacing a CV axle is a common AWD maintenance task. The time it takes depends on whether you’re replacing a single front axle or both front axles, and whether you’re dealing with rear axles as well. In most professional shops, a single front CV axle typically requires about 1.5–2.5 hours of labor, while replacing both front axles often falls in the 3–5 hour range. Rear CV axles usually take about 1–2 hours per side. If you’re tackling multiple axles or you encounter rusted or seized fasteners, plan for additional time.
What affects replacement time
Several factors influence how long the job takes, including which axle is being replaced, vehicle condition, and the shop’s equipment. Below are the common time ranges you’ll encounter.
- Front CV axle replacement (per axle, single): 1.5–2.5 hours
- Front CV axle replacement (both sides): 3–5 hours
- Rear CV axle replacement (per axle, single): 1–2 hours
- Rear CV axle replacement (both sides): 2–4 hours
Notes: Additional time may be needed if the axle nut is stubborn, the hub bearing is being replaced, or the ABS/wheel speed sensor is damaged. Rust and corrosion around the axle and hub can also extend the job by 0.5–1.5 hours or more.
Do-it-yourself timing and tips
For DIY enthusiasts, the clock starts once you begin prepping and ends when the axle is reinstalled and the vehicle is tested. Times vary widely by experience, tools, and the vehicle’s condition. Plan accordingly and prioritize safety.
- Front CV axle replacement (per axle) DIY time: roughly 2–4 hours for a first-timer; 1.5–2.5 hours for an experienced DIYer
- Rear CV axle replacement (per axle) DIY time: about 1–2 hours
- Replacing front and rear axles in one session: typically 4–8 hours depending on experience and rust
DIY projects require the right tools (jack stands, breaker bar, pry bars, torque wrench) and reference to Subaru’s service specifications for axle nut torque and hub fasteners. If anything is seized or damaged, the time can climb quickly.
Summary
Key takeaways: plan around 1.5–2.5 hours of labor per front CV axle at a shop, and 1–2 hours per rear CV axle. Replacing both front axles commonly runs about 3–5 hours, with extra time for complications. Do-it-yourself work can save labor costs but generally takes longer for first-timers and carries safety risks. Always consult the vehicle’s service manual for torque specs and procedures, and consider professional help if you encounter heavy corrosion or ABS sensor issues.