Parts for your 2018 Toyota Mark x-Rack boots

2018 Toyota Mark X rack boots — what they do and when to replace them

Yes, the 2018 Toyota Mark X does use rack boots. Toyota’s Electronic Parts Catalog (EPC) for the GRX13# series lists a “boot, steering rack” within the Steering Gear & Link group, and the Toyota Repair Manual for the same platform includes inspection and replacement procedures for the steering gear boots. Those technical sources confirm the Mark X runs a rack-and-pinion setup protected by bellows-style boots.

Rack boots (also called steering rack bellows) are the flexible rubber sleeves at each end of the steering rack. Their job is simple but critical: keep dust, water and grit out of the rack-and-pinion and inner tie rod joints, while keeping the factory-applied grease in. On the 2018 Mark X, healthy boots help maintain precise steering feel and even tyre wear across Aussie and Kiwi roads, whether it’s city commuting or weekend touring.

As they age, boots can crack, split or loosen at the clamps. Once contaminants get in, inner tie rods and rack seals can wear quicker, leading to play at the wheel, knocks over bumps, or uneven front tyre wear. Toyota’s service literature calls for regular visual inspection of the boots and clamps during routine servicing, that’s the perfect time to catch small issues before they snowball into a pricey steering gear replacement.

When replacing, use quality, model-correct boots and proper clamp bands rather than generic cable ties. Fitment is straightforward for a trained tech: the tie rod end is removed, the old boot and clamps come off, the rack area is cleaned, and the new boot is positioned and clamped with the correct orientation. A wheel alignment check is recommended afterwards, especially if any tie rod adjustment was disturbed. Always follow torque specs and procedures in the Toyota Repair Manual for the Mark X GRX13# steering section.

• Have the rack boots inspected at each service (or at least every 10,000–15,000 km/12 months).
• Replace at the first sign of cracking, perishing, oil/grease contamination, or loose clamps.
• If one boot has failed, consider doing both sides and checking inner and outer tie rods at the same time.

Look after the boots, and the Mark X’s steering stays tight, quiet and confidence-inspiring for many kilometres.

Popular questions about 2018 Toyota Mark X rack boots

How often should rack boots be replaced on a 2018 Mark X?
There isn’t a fixed kilometre limit, it’s condition-based. Have them inspected every service. In harsh climates or with lots of gravel driving, expect to replace them sooner. If any cracking or looseness shows up, swap them out promptly.

Do you need a wheel alignment after replacing rack boots?
If the inner and outer tie rods weren’t adjusted, toe might not change—but in real-world workshops, an alignment check is smart insurance. Any small movement at the tie rod can nudge toe out, so a post-job alignment is recommended.

Are universal rack boots OK for the Mark X?
Universal boots can work in a pinch, but model-specific boots usually fit better, flex correctly through the steering range and seal more reliably with OEM-style clamps. For longevity and steering feel, go for quality, vehicle-appropriate parts.