Parts for your 2017 Subaru Legacy-Cv boots

2017 Subaru Legacy CV boots: what they do and when to service them

Based on the Subaru Factory Service Manual for the 2015–2019 Legacy/Outback (Drive Shaft section) and Subaru’s genuine parts catalogues, the 2017 Subaru Legacy is fitted with constant velocity (CV) joints protected by rubber boots on both front and rear drive shafts. Being full-time AWD, it carries multiple CV joints and boots—two per axle—so there are boots at each end of the left and right front and rear shafts.

CV boots are simple but vital. They seal in the special CV grease and keep out water, grit, and road grime while the joint flexes through steering and suspension travel. When a boot stays intact and clamped properly, the joint runs cool and quiet for years. If a boot cracks, splits, or a clamp loosens, grease escapes and contaminants rush in, wearing the joint quickly and often leading to that tell-tale clicking on turns or a shudder under load.

For Aussie and Kiwi conditions—heat, rain, gravel, the odd corrugated road—regular checks are smart. A quick look at every service interval (typically 10,000–15,000 km) pays off. Techs should inspect all four axles’ inner and outer boots, looking for:

• Grease mist or splatter around the inside of the wheels, struts, or undertray
• Perished rubber, small cracks near the folds, or loose/broken clamps
• Clicks on tight turns, especially under throttle, or vibration on acceleration

If caught early, a boot-only repair is usually the most economical fix. That means removing the shaft, cleaning the joint, repacking with the specified high-moly CV grease, and fitting new quality boots and clamps. If noise is already present or water and grit have been inside for a while, replacing the complete driveshaft is often the better long-term value. Either way, correct torque of the axle nut, new cotter pins where applicable, and careful handling of ABS tone rings are musts.

Owners who cover plenty of kilometres or drive on coarse chip and unsealed roads should schedule proactive inspections. Choosing OE-spec neoprene boots or premium thermoplastic options helps them last. With eight CV boots working hard on a 2017 Legacy, keeping them sealed is cheap insurance for the AWD driveline and your tyres, wallet, and weekend plans.

Popular questions about 2017 Subaru Legacy CV boots

How often should CV boots be inspected on a 2017 Subaru Legacy?
They’re best checked at every routine service (about every 10,000–15,000 km) or before long trips. If the vehicle sees gravel, mud, or heavy rain, ask for a quick look during tyre rotations as well. Early detection avoids costly CV joint or shaft replacement.

Can a torn CV boot be replaced without changing the whole axle?
Yes—if the joint hasn’t run dry or ingested grit for long. A boot kit with fresh grease and clamps will usually sort it. If there’s clicking on turns, rust-coloured grease, or pitting inside the joint, a complete driveshaft is the smarter fix.

What are the signs a CV boot has failed?
Grease flung onto the inside of the rim or suspension, visible splits or perished rubber, a burning grease smell after a drive, and later, clicking or vibration under load. Any of these warrant prompt inspection.