Parts for your 2006 Toyota Mark x-Steering bushes

2006 Toyota Mark X Steering Bushes — What They Do and When to Replace Them

Technical references including the Toyota Service Information (TIS) Repair Manual for GRX120/121 (Steering — Rack and Pinion Power Steering) and the Toyota Electronic Parts Catalogue for GRX12# confirm the 2006 Toyota Mark X uses steering rack mounting bushes (insulators) and a column support bush. So steering bushes are fitted and relevant to this model.

On a 2006 Toyota Mark X, the steering bushes keep the rack-and-pinion assembly precisely located on the front subframe while soaking up noise, vibration, and harshness. They’re small, but they matter a lot: when those rubber insulators harden, tear, or oval out, the rack can shift under load. That shows up as vague on-centre feel, a clunk over bumps, tramlining, and even uneven tyre wear because toe can change as the car hits bumps or under braking.

For regular servicing, it’s smart to inspect the steering bushes every 20,000–30,000 kilometres or at major services. Look for perished rubber, cracking, shiny witness marks where the rack has been moving, or wetness from power-steering fluid leaks (fluid swells and weakens rubber). Symptoms owners often report include a knock when turning into driveways, steering that feels floaty at highway speeds, and tyre scrubbing despite correct alignment.

Replacement is straightforward for a competent workshop: safely support the vehicle, remove undertrays as needed, centre and lock the steering wheel, mark the intermediate shaft, support the rack, then remove the rack mounting bolts and swap the bushes. Torque the mounts to the factory spec with the rack centred, refit the column joint per the marks, and finish with a wheel alignment. It’s crucial to address any power-steering leaks first, otherwise fresh bushes won’t last.

Bush material choice comes down to priorities. Genuine-style rubber keeps the Mark X nice and quiet, ideal for daily use. Quality polyurethane bushes sharpen steering response and resist oil better, but can add a touch more road feel and light vibration. Either way, selecting parts that match the GRX120/121 platform ensures correct fit.

Good practice between services includes keeping an eye on front tyre wear patterns, checking for new knocks or creaks over speed humps, and making sure subframe and rack fasteners remain properly torqued after any front-end work. Treated well, steering bushes typically last many years, but high heat, fluid contamination, and rough roads can accelerate wear.

• Common signs of worn bushes: vague steering, clunks over bumps, tramlining, uneven tyre wear.
• Always perform a wheel alignment after bush replacement.
• Fix power-steering leaks promptly to protect new bushes.

Popular questions about 2006 Toyota Mark X steering bushes

Do all 2006 Mark X models have replaceable steering rack bushes?
Yes. The GRX120/121 Mark X uses a rack-and-pinion mounted to the front subframe with serviceable rubber insulators. While the rack itself can vary with engine and market, the mounting bushes are replaceable components rather than a welded or non-serviceable mount.

How long do the steering bushes last on a Mark X?
In normal mixed driving they commonly last 80,000–150,000 kilometres, but life varies with road conditions and exposure to oil. If the car sees plenty of potholes or the rack area has been soaked in power-steering fluid, expect earlier replacement. Any signs of play, knocks, or steering wander are a cue to inspect and replace.

Should they go rubber or polyurethane for replacements?
Rubber keeps factory comfort and low NVH, great for a daily driver. Polyurethane is firmer and resists oil, offering crisper steering feel and better longevity under hard use, though it can transmit a little more vibration. Either can be WOF/CoF friendly when fitted correctly, choose based on how the car is used and personal preference.