Parts for your 2009 Subaru Legacy-Cv joint

2009 Subaru Legacy CV joint — purpose, servicing and replacement advice

Based on technical sources — the Subaru Legacy/Outback 2005–2009 Service Manual (Drive Shaft System), Subaru parts catalogue listings for MY2009 (front and rear drive shafts with inner DOJ/outer CV joints and boots), and the Haynes Subaru Legacy & Outback 2000–2009 manual — the 2009 Subaru Legacy is fitted with constant velocity (CV) joints on its front and rear drive shafts. So, yes, a CV joint is directly relevant to this model.

This page talks through the 2009 Subaru Legacy CV joint in plain terms. The CV joints sit at each end of the drive shafts, letting the car transfer drive smoothly while the suspension moves and the wheels steer. The outer joint handles tight steering angles, while the inner joint (often a DOJ on Subarus) manages plunge as the suspension travels. When everything’s healthy, they’re silent and buttery smooth, when they’re not, they click on turns, vibrate on acceleration, or fling grease around the inner wheel.

As part of routine servicing, it’s smart to check the CV boots every service interval. A split boot lets grease escape and water/dirt sneak in, which can quickly chew out the joint. On a Legacy of this age, preventative boot replacement can save the hassle and cost of a whole shaft later.

• Tell-tale signs: clicking on full lock, shudder on take-off, grease splatter inside the wheel or along the control arms, or a torn/loose boot clamp.
• Inspection tip: with the car safely raised, rotate the wheel by hand and feel for notchiness in the outer joint, grasp the shaft and check for excessive play at the inner joint.
• Service approach: if the joint’s fine but the boot’s damaged, a boot kit with new clamps and fresh moly CV grease usually does the trick. If the joint is noisy or worn, a complete shaft assembly is often the most time‑effective fix.

During replacement, always use the specified grease quantity, new circlips where required, and torque the axle nut to factory spec before staking it. A road test afterwards should be quiet with no vibration. Wheel alignment usually isn’t needed unless suspension arms were disturbed, but it’s worth checking tyre wear and balance while you’re at it. With quality parts and careful fitting, the Legacy’s CV joints will keep the AWD system delivering that sure‑footed Subaru feel for many more kilometres.

• What are common symptoms of a failing CV joint on a 2009 Subaru Legacy?
  Most drivers notice a rhythmic clicking or clacking when turning, especially under light throttle in a car park. Other signs include vibration on acceleration, grease flung around the inner guard, or a visible tear in the boot. Left unchecked, the noise worsens and the joint can bind or fail.
• Do CV joints need regular replacement, or just when they wear out?
  There’s no set replacement interval. On a well‑maintained Legacy, CV joints often last many years. Replace boots proactively if they’re cracked, and only replace the joint or complete shaft if there’s noise, play, contamination, or pitting found during inspection.
• Is it safe to drive with a torn CV boot?
  Short term, gentle driving may be possible, but it’s risky. A torn boot quickly loses grease and lets grit in, accelerating wear. If caught early, a boot-only repair is usually fine, if driven for long with a torn boot, expect to replace the joint or the whole shaft.