Parts for your 2016 Toyota Mark x-Rack boots

2016 Toyota Mark X rack boots: what they are and when to replace them

Relevant technical sources confirm the 2016 Toyota Mark X (GRX130 series) uses rack boots. Toyota’s Repair Manual for the GRX130 steering section shows a rack-and-pinion steering gear with bellows-type boots on both ends, and the Toyota Electronic Parts Catalogue lists the component as “Boot, Steering Rack” for this model. Aftermarket fitment catalogues for GRX130 steering assemblies also specify replacement rack boots, reinforcing that this part is fitted and serviceable on the 2016 Mark X.

On the 2016 Mark X, rack boots (also called steering rack bellows) do a simple but critical job: they keep grit, water and road splash off the rack bar and inner tie rods, and they help retain the correct lubrication on the inner joints. The accordion design lets the rack move freely from lock to lock while sealing the internals from the harsh Aussie and Kiwi conditions. Whether the vehicle’s steering rack is hydraulic or electric assist, the boots still protect the moving bits. If the rack is hydraulic, finding oil pooled inside a boot is often a giveaway that the rack’s inner seal is leaking.

Good practice is to check the rack boots at every service or at least every 10,000 km. Look for splits in the folds, perished rubber, loose or missing clamps, and any dampness or oil traces. On gravel and coastal roads, UV and salt can age the material quicker, so regular under-car inspections pay off.

If a boot is torn, get onto it promptly. Grit inside the boot can chew out the inner tie rod and the rack surface, turning a cheap boot job into a full rack rebuild. Replace boots in pairs, use new clamps, and set the wheels straight ahead before removal so toe can be restored easily. Typical replacement involves removing the tie-rod end, sliding off the old boot and clamps, cleaning the area, then fitting the new boot without twisting it and securing with the correct inner and outer clamps. After any steering work, a wheel alignment is a must to protect your tyres and keep the Mark X tracking straight.

Handy pointers:

• Inspect at service intervals, replace at the first sign of cracking or looseness.
• If fluid is found inside a boot on a hydraulic rack, plan for rack seal repair or replacement.
• Choose quality OEM-equivalent boots suited to local heat, UV and road grime.
• Always follow torque specs for tie-rod ends and book an alignment afterwards.

Done right, fresh rack boots help the steering feel tight, quiet and precise, and they can save a mint by preventing premature rack wear.

Popular questions about 2016 Toyota Mark X rack boots

Does the 2016 Toyota Mark X use rack boots?
Yes. The GRX130-series Mark X has a rack-and-pinion steering gear with bellows-style rack boots on both ends, as shown in Toyota’s Repair Manual and listed in the Toyota Electronic Parts Catalogue under “Boot, Steering Rack”.

How often should rack boots be replaced on a Mark X?
There’s no fixed age, but they should be inspected every service or 10,000 km. Replace them at the first sign of splits, perishing, loose clamps or contamination. Many owners do them proactively in pairs when inner tie rods are serviced.

Is it safe to drive with a torn rack boot?
It’s not ideal. A torn boot lets in grit and water that can wear the inner tie rod and rack bar. If the rack is hydraulic and there’s fluid in the boot, a leaking rack seal can worsen. Short trips to a workshop are usually fine, but don’t put it off.