Parts for your 2017 Toyota Mark x-Rack boots

2017 Toyota Mark X Rack Boots

Yes, the 2017 Toyota Mark X uses rack boots. Toyota’s technical documentation for the GRX130/GRX133 series (Steering – Steering Gear service procedures in Toyota TIS/Repair Manual) and the Toyota Electronic Parts Catalog list the “steering gear boot” (bellows/gaiter) and clamps as standard components on both sides of the rack-and-pinion assembly. Whether the Mark X is equipped with hydraulic power steering or an electric power steering rack, the bellows boots are fitted to protect the inner tie rods and rack bar from dust, water and road grit.

For this model, the rack boots do a simple but vital job: they seal the moving bits from the elements while letting the rack travel freely. That means longer life for the rack seals and inner tie rods, smoother steering feel, and less chance of contamination turning into costly wear inside the rack. If the car runs a hydraulic rack, a torn boot can let grit chew up seals and lead to leaks. If it’s an electric rack, moisture ingress can cause corrosion and damage that gets pricey fast.

As part of regular servicing on a 2017 Mark X, a quick visual check of both boots is smart. Look for splits, perished rubber, oily residue, loose or missing clamps and any grit or moisture inside the bellows. Any tear is a fix-now item—leaving it will often take out the inner tie rod and can compromise the rack itself. In New Zealand, a split boot will fail a WOF, and the same goes for roadworthy inspections in Australia.

When replacing, it’s best practice to do boots in pairs and use OE-quality boots and proper band clamps (not cable ties). Avoid twisting the bellows, slide it on straight, seat the lips fully in their grooves, and clamp to spec. If the service manual calls for a small amount of grease under the boot, use the correct type sparingly—too much can blow the clamp off. After any rack boot or inner tie rod work, a wheel alignment is recommended so tyre wear stays even and the steering centres properly. A careful tech will also check the inner tie rods for play, confirm the rack is centred before clamping, and verify there’s no binding through full lock to lock. Done right, new boots keep the steering happy for years without any dramas.

• Inspect every service interval (around 10,000–15,000 km) or sooner if driving on gravel or through floodwater.
• Replace immediately if torn, contaminated, or clamps are loose.
• Get a wheel alignment after replacement.

FAQs

How often should the rack boots be checked on a 2017 Mark X?

They should be eyeballed at every routine service (roughly every 10,000–15,000 km) and any time the vehicle has been through deep water or heavy gravel. Early checks catch small splits before they become big bills.

Will a split rack boot fail a WOF or roadworthy?

Yes. In NZ a torn or unsecured steering rack boot will fail a WOF, and in Australia it will typically fail a roadworthy inspection. It’s considered a safety-related defect because it allows contamination of steering components.

Do I need a wheel alignment after replacing rack boots?

It’s strongly recommended. Even if toe settings weren’t intentionally changed, moving the inner tie rod or boot can nudge alignment. An alignment keeps the steering centred and prevents uneven tyre wear.