Parts for your 2018 Subaru Legacy-Rack boots

2018 Subaru Legacy rack boots — what they do and when to replace them

Yes, the 2018 Subaru Legacy absolutely uses rack boots. Subaru’s factory Service Manual for the BN/BS-platform Legacy (2018) shows a rack-and-pinion electric power steering (EPS) gear with protective bellows on each side of the rack. Subaru’s official parts catalogue (FAST/EPC) also lists these items as “Bellows – Steering Gear” or “Boot – Steering Rack” under Steering Gear & Linkage for the 2018 Legacy. Those technical sources confirm rack boots are relevant, fitted, and serviceable on this model.

On this Subaru, rack boots are flexible bellows that cover the inner tie rod ends and the exposed ends of the steering rack. Their job is to keep dust, water, and road grit out, while holding the correct grease around the inner joints so the steering stays smooth and the rack lasts. Because the 2018 Legacy runs EPS, there’s no power-steering fluid inside the boots, any liquid found in a torn boot is usually water ingress or sling-off from elsewhere.

Service-wise, it’s smart to have the rack boots inspected at every routine service interval. In Aussie and Kiwi conditions—wet roads, corrugations, and the odd gravel trip—a quick look goes a long way. Replace a boot if it’s split, perished, or the clamps are loose. If one side has failed, doing both bellows as a pair is good practice.

Typical signs a boot needs attention include:

• Visible cracks, tears, or missing clamps
• Grease weeping, grit build-up, or moisture inside the bellows
• Notchy steering feel after driving in heavy rain or on gravel

When replacing, stick with quality OE-spec bellows and new clamps. The job often involves loosening the outer tie-rod locknut and removing the tie-rod end, so plan for a wheel alignment straight after. A technician will centre the steering, mark or measure the tie-rod position, swap the boot, secure clamps, then torque everything to factory spec before sending the car for alignment. If a boot has been split for a while, it’s worth checking the inner tie rod and the rack for wear.

For reference, Subaru’s Service Manual (Steering/EPS section for BN/BS Legacy, MY2018) and the Subaru FAST parts catalogue are the primary technical sources identifying and illustrating the rack bellows used on this vehicle.

FAQs

Does a 2018 Subaru Legacy have rack boots?
Yes. The 2018 Legacy uses rack-and-pinion electric power steering with bellows (rack boots) on both sides of the steering rack to keep contaminants out and grease in, as shown in Subaru’s Service Manual and parts catalogue for the BN/BS platform.

How often should the rack boots be checked or replaced?
Have them checked at every service. Replace any boot that’s split, perished, or loose. Because the tie-rod end is usually disturbed during replacement, book a wheel alignment straight after.

Can a DIYer replace the rack boots at home?
It’s doable with the right tools and a workshop manual. Mark tie-rod positions carefully, fit new clamps, and don’t twist the bellows. Always follow torque specs and arrange a professional alignment afterward.