How long do CV joints last on Subaru?
In general, CV joints on Subaru models last about 60,000 to 100,000 miles, assuming the protective boots stay intact and maintenance is up to date. Actual lifespans vary depending on boot condition, climate, road conditions, and driving habits.
Subaru's all-wheel-drive lineup uses CV joints on front axles and, in many models, rear axles as well. Boots protect the joints from dirt and keep lubrication in; when a boot tears, grease can escape and contaminants can enter, speeding wear and increasing the risk of failure. This article reviews typical lifespans, early warning signs, and ways to extend CV joint life.
Understanding CV joints on Subaru AWD systems
Subaru’s permanent all-wheel-drive system uses constant-velocity (CV) joints on the front axles and, where equipped, on the rear axle. Outer joints handle steering articulation, while inner joints accommodate shaft rotation. Boots shield these joints from dirt and keep grease in. A torn boot can lead to grease loss and contamination, accelerating wear and raising the chance of noise, vibration, and eventual failure.
Boot condition, climate, and usage matter
Industry design targets long service life for CV joints, but harsh winters, road salt, gravel, and off-road use increase wear. Subarus in snow-prone regions or with frequent stop-and-go driving may see earlier wear if boots are compromised.
Typical lifespans and what influences them
Before listing common ranges, keep in mind that exact numbers depend on boot integrity and driving environment.
- Front outer CV joints often wear first due to steering angle and load; typical life ranges from about 70,000 to 150,000 miles, with many reaching around 100,000 miles if boots remain intact and grease stays in place.
- Front inner CV joints can last longer, typically around 100,000 to 180,000 miles, depending on driving conditions and maintenance.
- Rear CV joints (on AWD models with rear axles) show similar variation, roughly 100,000 to 180,000 miles when well maintained, though results vary by model and usage.
Actual lifespans vary widely. Boots that stay intact and clean allow joints to reach higher mileages; torn boots dramatically shorten life by introducing dirt and losing lubrication.
Signs that CV joints may be nearing failure
Look for early warning signs so you can service before a failure strands you on the road.
- Clicking or popping noises when turning at low speeds, often indicating outer joints.
- Grinding, clunking, or knocking sounds while driving or accelerating.
- Vibration or shuddering at highway speeds, especially when under load.
- Grease splatter on wheels or inside the wheel well from a torn boot.
- Inconsistent steering feel or sudden loss of power transfer in extreme cases.
Responding promptly to these symptoms can prevent more extensive driveline damage and expensive repairs.
Maintenance tips to extend CV joint life on Subaru
Prudent maintenance can maximize CV joint life and reduce the risk of sudden failure.
- Inspect CV boots at regular maintenance intervals and after winter driving; look for cracks, tears, or missing clamps.
- Replace torn boots promptly to prevent grease loss and contamination.
- Use quality CV axle assemblies and ensure proper boot clamp torque and grease amount during replacement.
- Avoid aggressive driving that increases wheel articulation and joint load; drive smoothly on rough roads.
- Keep tires properly inflated and wheels aligned to minimize abnormal joint loading and wear.
- Follow Subaru service recommendations for your model/year and address any driveline service bulletins.
Staying vigilant and addressing boot damage early can extend CV joint life and prevent costly repairs down the line.
Summary
CV joints on Subaru vehicles generally endure long service lives when their protective boots remain intact and maintenance is timely. Typical ranges are roughly 60,000 to 100,000 miles, with some cars lasting beyond 100,000 miles if kept in good condition. Torn boots, contaminated grease, and harsh driving environments can shorten life, sometimes to as little as 70,000 miles or up to 150,000 miles for front outer joints. Regular boot checks, prompt boot repairs, and careful driving are your best defense against unexpected CV joint failure.
How do I know if my Subaru CV joint is bad?
But I don't get much noise but then if I turn. It. You hear that rumble and feel that rumble that's the U-jints. Trying not to break in half. So if when you're driving straight. Ahead.
How long do Subaru CV joints last?
80,000 to 100,000 miles
The lifespan of your CV axle is typically fairly long, withstanding 80,000 to 100,000 miles under regular driving conditions. If you begin hearing a loud, rhythmic clicking noise as you turn, it's a good sign the axle is failing.
At what mileage should CV joints be replaced?
approximately 70,000 to 130,000 miles
However, under normal driving conditions, CV joints need replacement after approximately 70,000 to 130,000 miles. However, cars driven in rough, off road, or extreme weather conditions could require the replacement sooner than cars driven under normal conditions.
Are Subaru's reliable after 100k miles?
Yes, Subarus can be very reliable after 100,000 miles, often lasting 200,000 to 300,000 miles or more, but this depends heavily on proper and consistent maintenance. A common and potentially costly repair for older models is head gasket replacement, which often occurs around the 100,000 to 130,000-mile mark, but is manageable with updated parts.
Factors for long-term reliability
- Maintenance is key: Following the recommended maintenance schedule, especially for the 100,000-mile service which includes replacing spark plugs and fluids, is crucial.
- Head gasket issues: Many older models can face head gasket leaks, but this is a known issue that can be addressed with updated kits to fix the problem and extend the car's life.
- Model-specific considerations: Newer models with FB engines have timing chains, avoiding the need for timing belt replacement. However, some early FB engines had issues with oil consumption and certain CVT transmissions may need repairs.
- Beyond major repairs: After the initial 100,000-mile mark, other components like suspension parts, wheel bearings, and the alternator may need replacement, which is common for any car at this age.
What to do for a reliable Subaru over 100k miles
- Follow the schedule: Ensure all recommended services, especially fluid and spark plug changes, are completed on time.
- Address known issues: If the car has the potential for head gasket issues, factor in the cost of replacement, preferably with updated parts.
- Invest in quality repairs: Use high-quality parts and find a reputable mechanic to ensure the repairs are done correctly.
- Check maintenance history: When buying a used Subaru over 100k miles, thoroughly check its maintenance records to understand its history and condition.
