Parts for your 2016 Toyota Mark x-Rack boots

2016 Toyota Mark X rack boots — what they do and when to replace them

Referencing Toyota’s own technical material confirms the 2016 Toyota Mark X uses rack boots. The Toyota Electronic Parts Catalogue (GRX130/133, Steering Gear & Linkage) shows a bellows-type “Boot, Steering Gear” fitted to each end of the rack, and the Toyota TIS Repair Manual for the Mark X (X130) includes inspection and replacement steps for the steering rack boots and clamps. Whether the vehicle is equipped with electric or hydraulic assist, the rack-and-pinion assembly still relies on these protective boots.

On the 2016 Mark X, rack boots act like a concertina-style dust and moisture shield for the inner tie rods and rack seals. They let the steering move freely while keeping grit, water, and road grime out, and holding the right amount of grease where it needs to be. If a boot tears or the clamp loosens, road debris and moisture can chew through the inner tie rod and the rack’s seals, leading to stiffness, free play, or leaks. It’s the sort of small, inexpensive part that saves a very big bill — and can cause a WOF/RWC fail if split.

A sensible service routine has the rack boots visually checked at every scheduled service, especially if the Mark X spends time on rough roads. By the 100,000–150,000 km mark, the original rubber can harden or crack from age and heat, so closer attention is smart. Boots that look fine from one angle can show splits when the steering is turned, so inspections should be done lock-to-lock with a torch.

• Watch for: cracks in the bellows, oil or grease weeping from the boot, loose or missing clamps, swollen rubber, or dirt tracking past the seal lips.
• If replacement’s needed: use OE-quality boots and one-time clamps, avoid twisting the boot during fitment, refresh inner tie rod grease as required, and check inner/outer tie rods for play.
• After any boot work: a wheel alignment is recommended to keep the Mark X tracking straight and protect tyre life.

Most workshops can replace rack boots without removing the entire rack. Time varies with access, but expect roughly 0.8–1.5 hours per side plus alignment. Typical pricing lands around AU,180–,400 or NZ,200–,450 per side including alignment, depending on parts choice and local labour rates. A good shop will also recheck for any seepage at the rack ends and confirm smooth steering feel on a quick road test.

Popular questions about 2016 Toyota Mark X rack boots

Are split or torn rack boots a WOF/RWC issue on a 2016 Mark X?

Yes. In both NZ and Australia, per common roadworthiness guidelines, a split or insecure steering rack boot is typically a fail item because it allows contamination of a safety‑critical steering component. Replacing the boot promptly prevents inner tie rod wear and protects the rack seals.

Can rack boots be replaced without pulling the steering rack out?

On the Mark X, the boots are usually replaced in situ. The outer tie rod end is removed, the old boot and clamps come off, and the new boot is slid on and clamped correctly. It’s straightforward for a qualified tech and normally followed by a wheel alignment.

How long do the original rack boots usually last?

There’s no fixed interval. Many last well beyond 100,000 km, but age, heat, and road grime can accelerate cracking. Regular service inspections are the best guide — if the boot shows even fine splits or loose clamps, replacement is cheap insurance against steering gear damage.