Parts for your 2012 Toyota Mark x-Rack boots

2012 Toyota Mark X rack boots (steering rack gaiters)

According to Toyota’s GRX130/133 Repair Manual (Steering – Steering Gear & Linkage) and the Toyota Electronic Parts Catalogue for the Mark X, the 2012 Toyota Mark X runs a rack‑and‑pinion steering gear and is fitted with rack boots (also called steering rack gaiters/boots). JPNZ workshop manual summaries for GRX130 models likewise show the boot sub‑assembly on each end of the rack. So rack boots are absolutely relevant on this model.

On the 2012 Mark X, rack boots do the unglamorous but vital job of sealing the open ends of the steering rack, keeping dust, water and road grit out while allowing the inner tie rods to move freely. Whether the car’s equipped with electric or hydraulic assist, the boots protect the rack bar and inner joints, help retain grease on the inner tie rod ball sockets, and prevent contamination that can chew out seals and cause play. If a hydraulic rack seal fails, fluid can pool inside a boot—often the first sign there’s trouble brewing.

Good practice for servicing a 2012 Toyota Mark X rackboots setup is to visually inspect the gaiters at every service or at least every 10,000–15,000 kilometres. Look for cracks, splits, loose or missing clamps, or wetness inside the boot. Any tear lets in grime that can quickly turn a smooth steering feel into notchy, imprecise action and, in NZ or Australia, a torn boot can put a dent in a WOF/roadworthy check.

When replacement’s needed, it pays to fit quality boots with proper band clamps rather than cable ties. The steering should be kept centred, the new boot slid on without twisting, and clamp lands seated correctly on the rack housing and tie rod. Because the outer tie rod end is usually removed to swap a boot, a wheel alignment is recommended straight after to keep tyre wear in check. If a boot is found full of power steering fluid, that points to an internal rack seal issue—boots alone won’t fix it, and the rack should be assessed. Always follow the Toyota torque specs for the tie rod end locknut and related fasteners as listed in the GRX130 repair manual.

• Common signs a rack boot needs attention:
  • Cracks or splits in the rubber
  • Grease or oil weeping from inside the boot
  • Loose or missing clamps
  • Steering play or a knock from the front end

Kept in good nick, the Mark X rack boots help the steering rack last the distance with tidy, accurate feel for heaps of kilometres.

Popular questions about 2012 Toyota Mark X rackboots

Do all 2012 Toyota Mark X models have rack boots?

Yes. Technical documentation for the GRX130/133 Mark X shows a rack‑and‑pinion steering gear with a boot (gaiter) on each end. This applies whether the assist is electric or hydraulic—the boots protect the rack and inner tie rods from contamination.

If a boot is missing or torn, it should be replaced promptly to avoid damage to the steering gear and potential issues at WOF/roadworthy inspection.

How often should rack boots be inspected or replaced on a Mark X?

Inspect at each service or roughly every 10,000–15,000 km. Boots aren’t a fixed-interval replacement item, they’re changed when cracked, split, loose, or contaminated with fluid or grit.

If a boot is damaged on one side, it’s smart to check the other side closely and consider replacing in pairs. Always follow up with a wheel alignment after tie rod work.

Can a torn rack boot affect handling or cause a WOF/roadworthy fail?

It can do both. A torn gaiter allows water and grit to reach the inner tie rod and rack bar, accelerating wear and creating play or notchy feel at the wheel.

In NZ and Australia, a split or unsecured steering rack boot is commonly a fail item, so sorting it early saves hassle and keeps steering sharp.