Parts for your 2008 Toyota Mark x-Rack boots

2008 Toyota Mark X rack-boots: what they do and how to look after them

Rack-boots are absolutely fitted to the 2008 Toyota Mark X. Technical sources including the Toyota Repair Manual for GRX120/121/125 (Steering – Power Steering – Rack and Pinion) and the Toyota Electronic Parts Catalogue list two steering rack gaiters/boots (left and right) on this model’s hydraulic rack-and-pinion assembly. Local roadworthiness guidance such as the NZTA Vehicle Inspection Requirements Manual and Australian state roadworthy criteria also call out split or insecure steering rack gaiters as a fail item, reinforcing that the part is present and safety-relevant on this vehicle.

On the Mark X, rack-boots (also called steering rack gaiters or bellows) are flexible rubber sleeves that seal the open ends of the steering rack. They keep dust, water, and grit away from the inner tie-rod joints and the rack’s oil seals, while helping retain grease where it’s needed. Because the 2008 Mark X uses hydraulic power steering, intact boots also help prevent contaminants from chewing out the rack bushings and seals, which can otherwise lead to leaks and an expensive rack overhaul.

Age, heat from the engine bay, road debris, and oil contamination can make rack-boots go hard, crack, or split. Once torn, grit moves in and lubrication moves out, accelerating wear. Tell-tales include visible cracks, wetness or grease mist around the boot area, a light knock over bumps, or a steering feel that’s a bit notchy.

• Inspection: Have the rack-boots checked at every service (around 10,000–15,000 km) and before long trips.
• Replacement: If one boot is torn, replace them as a pair. Use quality clamps, don’t reuse rusty ones.
• While you’re there: Check inner tie rods and rack seals for play or leaks, replace any worn bits together.
• Fluids: If contamination is found, have the power-steering fluid changed with the spec’d ATF shown in the owner’s manual.
• Alignment: Any tie-rod work calls for a wheel alignment straight after.

DIYers can tackle rack-boot replacement with the car safely supported, the front wheels off, and the tie-rod end removed to slide the old boot off. Seized hardware or inner tie-rod play is the point to hand it to a pro. Correct boot seating and clamp fitment are crucial—no twists, no nicks, and no over-tightening that could cut the rubber.

Popular questions about 2008 Toyota Mark X rack-boots

Do all 2008 Toyota Mark X models have rack-boots?
Yes. Both GRX120/121/125 variants with hydraulic power steering use a rack-and-pinion assembly with a boot on each side. This is confirmed by the Toyota Repair Manual and Toyota EPC listings for the model.

How often should rack-boots be replaced?
There’s no fixed interval. They’re a “inspect and replace on condition” item. Have them checked each service, many last 8–12 years, but heat and road grime can shorten that. Replace at the first sign of cracking, oil swelling, or a split.

Is it okay to drive with a torn rack-boot?
Best avoided. A torn boot lets water and grit in, which can score the rack, wear out the inner tie rod, and damage seals—often turning a cheap boot job into a costly rack rebuild. Minimise driving and get it sorted promptly, with an alignment after any tie-rod work.