Parts for your 2015 Subaru Outback-Rack boots

2015 Subaru Outback rack boots — what they do and when to replace them

Technical sources confirm rack boots are fitted and relevant on the 2015 Subaru Outback. The Subaru Legacy/Outback 2015MY Service Manual (Steering – Gearbox) depicts an electric rack-and-pinion steering gear with bellows-style boots on each side, shielding the inner tie rods. Subaru’s OEM parts catalog for the BS-series Outback also lists “Boot – Steering Gear” with clamps, reinforcing that these components are standard equipment on this model.

On the 2015 Outback’s electric power steering rack, the rack boots (also called bellows) keep dust, water, and road grit out of the inner tie rod joints and the rack bar while allowing full steering travel. They also help retain the correct grease at the inner joints. If a boot splits, contaminants get in, the inner tie rod can wear quickly, and the steering rack itself can suffer expensive damage. Because this Outback uses electric power steering, there’s no power-steering fluid, any oily wetness around a boot usually points to another leak nearby (or CV grease being flung), which still needs sorting.

As part of regular servicing, a quick visual under the front end goes a long way. At each service (or roughly every 10–15,000 km), a technician should:

• Inspect both rack boots for cracks, splits, or loose/missing clamps.
• Squeeze the bellows gently to feel for grit or water, neither should be present.
• Check inner tie rod play, a torn boot often shortens the life of the inner joint.

If a boot is damaged, replacing it promptly is cheap insurance for the steering gear. Best practice is to fit new clamps, ensure the boot is seated in its grooves, and avoid twisting the bellows. A light smear of suitable grease on the inner joint is normal, but don’t pack the boot solid. If the tie rod is disturbed during the job, have the front toe checked, it’s quick and keeps tyre wear in check.

Owners who tour unsealed roads or beaches should ask for extra-keen inspections, because sand and silt are boot killers. Any Outback headed for a WOF or roadworthy inspection is more likely to pass when the rack boots are intact, clean, and clamped tight.

• Signs a rack boot needs attention:
  • Visible splits, perishing, or oil/grease contamination
  • Clicking or looseness from the inner tie rod area
  • Heavier or gritty steering feel after rain or off-road use

FAQs

Does the 2015 Subaru Outback have rack boots?
Yes. The 2015MY Subaru service manual shows bellows-type steering gear boots on both sides of the electric rack, and the OEM parts catalog lists the boots and clamps for the BS-series Outback.

How long do rack boots last on a 2015 Outback?
There’s no fixed interval. In typical Aussie and Kiwi conditions they can last many years, but heat, age, and off-road grit can accelerate cracking. Have them checked at every service and after rough-road trips.

Is it safe to drive with a torn rack boot?
Not for long. A torn boot lets in dirt and water, which can quickly wear the inner tie rod and rack. It can also lead to a failed WOF/roadworthy. Replace the boot promptly and check alignment if steering components were moved.