Parts for your 2015 Toyota Mark x-Rack boots

2015 Toyota Mark X rack boots

Yes — rack boots are fitted to the 2015 Toyota Mark X. Technical sources that outline this include Toyota’s Electronic Parts Catalogue for the GRX130/GRX133 series (Steering Gear & Linkage diagrams list a “Boot, Steering Rack”), and the Toyota Repair Manual for the same platform, which specifies inspection and replacement steps for the rack-and-pinion bellows (often called rack boots or gaiters). Major aftermarket fitment catalogues also list dedicated rack boot kits for the 2015 Mark X, confirming the part’s relevance.

On this model, the steering is a rack-and-pinion layout (with electric power assist on most grades), and the rack boots are the flexible bellows that seal each end of the steering rack and cover the inner tie rod joints. Their job is to keep dust, water, and road grime out while holding the right amount of grease in — a simple bit of gear that makes a massive difference to steering longevity and feel.

For owners and service advisors looking after a 2015 Toyota Mark X, regular checks of the rack boots during routine servicing are a smart move. If a boot is split, perished, loose on the clamp, or wet with contamination, it’s time to replace it before grit chews out the inner tie rod or the rack. On EPS racks there’s no power-steering fluid, so any oil found may be from engine bay misting or previous lubrication, on hydraulic variants (if fitted in some markets), fluid collecting inside a boot points to an internal rack seal leak that needs attention.

• Tell-tale signs a rack boot needs attention:
  • Visible cracks, tears, or missing clamps
  • Clicking or notchiness when turning, especially over bumps
  • Uneven or wandering steering after rain or dirt-road driving
• Good servicing habits:
  • Inspect every 10,000–15,000 km or each service, and after floodwater or gravel use
  • Replace boots in pairs if they’re aged or one has failed
  • Use quality OE-style ear clamps, avoid loose cable ties
  • Keep the boot untwisted with the vent path oriented correctly
  • Any boot change should be followed by a wheel alignment check

Replacement is straightforward: the outer tie rod end comes off, the old boot and clamps are removed, the inner joint is inspected and lightly greased as specified, then the new boot and clamps are fitted. Counting threads on removal helps, but a proper alignment is still recommended. The parts are inexpensive, labour is typically around 0.5–1.0 hour per side depending on corrosion and access. Keeping those bellows in good nick helps the Mark X steer sweetly for many more kilometres.

Popular questions about 2015 Toyota Mark X rack boots

Do all 2015 Toyota Mark X models have rack boots, even with electric power steering?

They do. Whether the assist is electric or hydraulic, the steering gear is rack-and-pinion and uses rack boots to seal the rack ends and inner tie rods. The boots protect the moving joints from dust, water, and grit that can cause premature wear.

Electric power steering changes how assistance is delivered, not the need for the bellows. So every 2015 Mark X still relies on intact rack boots for durability and consistent steering feel.

How often should the rack boots be checked or replaced?

Have them inspected at each service (about every 10,000–15,000 km) and after any deep water or gravel-road use. There’s no fixed replacement interval — they’re changed on condition. If a boot is cracked, split, loose, or contaminated inside, replace it promptly.

When one side fails due to age, it’s sensible to do both sides and follow up with a wheel alignment to keep tyre wear and steering feel spot on.

Will a split rack boot fail a WOF or rego inspection?

Often, yes. In New Zealand a split or unsecured boot that allows contaminants into steering components can lead to a WOF fail. In Australia, similar roadworthy checks apply, and a damaged boot is typically a defect until repaired.

Fitting new boots with proper clamps and confirming the alignment usually sorts the issue, keeping the Mark X compliant and safe on the road.