Parts for your 2018 Toyota Mark x-Steering bushes

2018 Toyota Mark X steering bushes — are they actually a thing?

Short answer: steering bushes aren’t a separate, serviceable part on the 2018 Toyota Mark X. Toyota’s GRX130-series service literature for the Mark X (Steering: Electric Power Steering) and the Toyota Electronic Parts Catalogue for the 2018 model list a rack-and-pinion electric power steering (EPS) unit bolted to the front suspension member without standalone “steering rack bushes” as a replaceable item. Any minor isolation is built into the rack housing or mounting scheme and isn’t supplied as individual bushes.

Why that matters: older vehicles or some hydraulic systems used soft rubber bushes to isolate a steering box or rack from the chassis. On the Mark X, the EPS rack needs a rigid mount so the torque sensor and assist control stay precise. Squishy bushes would add compliance, dull road feel and can upset on-centre accuracy. NVH is handled elsewhere — through the front subframe mounts, strut top mounts and the control arm bushes — rather than via big, soft rack bushes.

So if there’s a knock or play on a 2018 Mark X, the workshop won’t be chasing “steering bushes”. They’ll usually check:

• Inner and outer tie-rod ends and rack boots
• Lower control arm front and rear bushes, and ball joints
• Strut top mounts and bearings
• Intermediate steering shaft universal joints and column splines
• Front subframe (engine cradle) mounts and fasteners

For servicing, the sensible approach is a full front-end inspection at each service or when tyres are replaced: look for torn rack boots, grease fling, cracked control arm bushes and any free play in tie-rods. Confirm the steering rack-to-subframe bolts are torqued correctly, then book a wheel alignment if any parts are replaced or the steering wheel isn’t sitting straight. If a parts list or quote mentions “steering rack bushes” for this model, it’s worth double-checking the VIN and the parts diagram — they’re not listed as a separate bush kit for the GRX130 Mark X.

Owners chasing a sharper feel can legitimately improve things with fresh control arm bushes, quality tyres, and keeping alignment specs on point. If the rack itself is worn (free play or fluid-free EPS noise), Toyota services the steering gear as an assembly rather than with individual rack-mount bushes.

FAQs

Does the 2018 Toyota Mark X have steering rack bushes?
No, not as separate, replaceable items. The Mark X uses an electric power steering rack that mounts rigidly to the front subframe. Toyota’s service information and parts catalogue for the GRX130 don’t list standalone rack bushes for this model year.

What causes a clunk or vague steering feel if there are no steering bushes?
Most front-end clunks or looseness come from worn tie-rod ends, tired lower control arm bushes or ball joints, or a strut top mount on the way out. Less commonly, play can come from the intermediate steering shaft joints. A proper inspection on a hoist will pinpoint which bit has the movement.

Can aftermarket polyurethane steering bushes be fitted to a Mark X?
Aftermarket suppliers typically don’t offer a steering rack bush kit for the GRX130 Mark X because the rack isn’t designed to use separate bushes. Poly options are more common for control arm bushes, which can sharpen steering response without trying to reinvent the rack mounting.