Parts for your 2015 Toyota Fortuner-Rack boots

2015 Toyota Fortuner rack boots: purpose, checks and when to replace

Based on Toyota technical literature, the 2015 Toyota Fortuner (AN150/151 series) uses a hydraulic rack-and-pinion steering gear, so rack boots (also known as steering rack gaiters or bellows) are absolutely fitted. This is documented in Toyota New Car Features for the AN150 platform and the Toyota Repair Manual/Workshop Manual steering section, and is mirrored in the Toyota Electronic Parts Catalogue, which lists “Boot, Steering Gear” for Fortuner/Hilux derivatives (typical Toyota part numbers start with 45535-0K0xx, varying by build).

On a 2015 Fortuner, rack boots do a deceptively important job. They seal each end of the steering rack, keeping dust, mud, water and road grit out of the inner tie rod joints and rack seals, while allowing the rack to move freely. That means sharper steering feel, longer inner tie rod life and fewer headaches with power steering fluid leaks caused by contaminated seals. In Aussie and Kiwi conditions—think long gravel roads, beach runs, creek crossings and plenty of red dust—healthy boots are cheap insurance.

Servicing-wise, a quick look at the rack boots should be part of every service. If they’re cracked, perished, oily, or throwing grease, it’s time to replace—ideally in pairs. Torn boots let grit in, which chews out the inner joint and can let fluid pool inside the bellows. Left too long, that can turn into a pricey rack rebuild.

• Check at each service or after heavy off-road/river work.
• Replace at the first sign of splits, stiffness or weeping.
• Use quality OEM or equivalent boots with proper ear clamps, not cable ties.

Replacement is straightforward workshop fare: remove the tie rod end, slide the old boot off, clean the rack tube and inner joint, then fit the new boot without twisting the bellows and secure with correct clamps. Centre the rack so the boot isn’t preloaded at full lock, and book a wheel alignment after reassembly—disturbing the tie rod usually nudges toe. A dab of suitable grease on the inner joint ball helps, but don’t pack the boot solid.

How long do they last? Many go 5–10 years, but UV, heat and off-road use can halve that. For WOF/regos, a split steering boot is commonly a fail, so it’s worth getting ahead of it. Keeping the Fortuner’s rack boots in good nick pays back with tighter steering, fewer knocks over corrugations and less chance of an unexpected leak spoiling the next trip.

• Popular questions about 2015 Toyota Fortuner rack boots

How do I know if my Fortuner’s rack boots need replacing?

Look for visible splits or perishing in the bellows, grease flung around the inner guard, dampness or fluid inside the boot, and new knocks or vagueness in the steering. After beach or river work, a closer look is wise because grit and salt accelerate wear.

If a boot is damaged, act quickly. Grit inside will hammer the inner tie rod and rack seal, turning a simple boot job into a bigger steering repair.

Can I keep driving with a split rack boot?

Short trips to a workshop are usually fine, but extended driving with a torn boot risks contaminating the inner joint and seal. That can lead to premature play, uneven tyre wear and potential power steering leaks down the track.

It’s far cheaper to replace a boot promptly than to replace an inner tie rod or rebuild a leaking rack later.

Do I need a wheel alignment after replacing rack boots?

Yes, plan on an alignment. The tie rod end typically has to come off to fit the boot, and even careful refitting can nudge toe. An alignment protects tyres and restores straight-ahead feel.

If you’re remote, count threads or measure before removal to get it close, then book a proper alignment as soon as practical.