Parts for your 2017 Subaru Outback-Ball joints

2017 Subaru Outback ball joints: what they do and when to replace them

Ball joints are absolutely fitted to the 2017 Subaru Outback. The Subaru Factory Service Manual for the 2015–2019 Outback/Legacy platform details front lower ball joint inspection and replacement procedures, and the Subaru Genuine Parts catalogue lists the front lower ball joint (PNC 20206, commonly 20206AJ000) for MY2017. Independent manuals, such as the Haynes Repair Manual for Subaru Legacy & Outback 2010–2019, also cover the job. So, ball joints are very much relevant to this model.

On this Outback, the front suspension is MacPherson strut with a lower control arm, and the front lower ball joint is the pivot that lets the steering knuckle move up and down while steering left and right. It’s a sealed, hard-working joint that keeps the front end planted, the steering precise, and the tyres wearing evenly. The rear runs a multi-link layout, while most of the movement is on bushings, some variants also use spherical/ball-type joints at the knuckle ends. Day to day, owners will mainly deal with the front lower ball joints.

Because the joints are sealed, there’s no greasing in regular servicing. The smart play is inspection at service intervals or before big road trips. A technician will check the boots for tears, look for grease seepage, and feel for play with the wheel off the ground. Any play, binding or a split boot is grounds for replacement—simple as that.

• Common signs they’re tired: clunks over bumps, vague or wandering steering, uneven or saw-tooth tyre wear, and a squeak or notch as the wheel’s turned.
• When to replace: after a curb strike or pothole hit, if a boot’s torn, or at higher kilometres when other control arm parts are being renewed.
• Good practice: replace in axle pairs, use quality OEM-equivalent parts, and book a wheel alignment straight after. Ask the shop to torque all fasteners at normal ride height and to check tie rod ends and control arm bushings while they’re there.

DIYers will want the correct pinch-bolt procedure and torque specs from the service manual, plus a proper separator tool to avoid damaging the knuckle. For everyone else, a reputable workshop can sort the lot quickly and restore that planted Subaru feel.

Technical sources referenced: Subaru Factory Service Manual (2015–2019 Outback/Legacy, Front Suspension—Ball Joint), Subaru Genuine Parts Catalogue (MY2017 Outback, PNC 20206 Front Ball Joint, e.g., 20206AJ000), Haynes Repair Manual: Subaru Legacy & Outback 2010–2019, Front suspension chapter.

Popular questions about 2017 Subaru Outback ball joints

How long do front ball joints last on a 2017 Subaru Outback?
With normal road use they often go well past 120,000–160,000 km, but lifespan swings a lot with gravel use, potholes, and salty conditions. Once the protective boot tears and lets in grit or water, wear accelerates quickly. Regular inspections help catch issues before they chew out tyres or other parts.

Do you need a wheel alignment after replacing ball joints?
Yes. Changing a front lower ball joint disturbs the relationship between the knuckle and control arm, which can nudge camber and toe. A proper alignment right after the job protects tyres and keeps the steering tracking straight.

Can worn ball joints damage other components?
They can. Excess play hammers on the control arm bushings, tyres, and even the tie rod ends. Left too long, a severely worn joint can affect braking stability. Replacing a suspect joint early is cheaper than chasing the flow-on effects later.