Parts for your 2015 Toyota Mark x-Steering bushes

2015 Toyota Mark X steering bushes — what they do and when to replace them

Based on Toyota’s technical literature for the GRX130-series Mark X (2012–2019) — specifically the Steering section of the Toyota Repair Manual and the Toyota Electronic Parts Catalogue (EPC) under Steering Gear & Link — the 2015 Toyota Mark X uses a rack-and-pinion steering gear mounted to the front subframe with rubber “cushion” bushings. These are commonly referred to as steering bushes. Because the rack is isolated by these cushions, steering-bushes are absolutely relevant to this model.

On this Mark X, the steering bushes secure the rack solidly while soaking up vibration and road shock. That isolation helps cut noise and harshness in the cabin and keeps the wheel feel tidy and predictable. When the bushes age, harden, or split, the rack can shift slightly under load, which shows up as vague on-centre feel, a light knock over bumps, or a shimmy through the wheel on rough roads. Toyota’s workshop guidance treats the bushes as serviceable hardware during steering gear R&,R, and the EPC lists them as separate cushion components rather than welded-in bits, which makes replacement straightforward for a technician.

Servicing advice for a 2015 Mark X is simple: inspect the steering bushes at regular service intervals (every 40,000–60,000 km is a good rule of thumb, or sooner if the car sees rough roads). Look for perishing, cracking, oil contamination, or any sign the rack has been chafing its mounts. While many 2015 Mark X variants use electric power steering (EPS), which avoids power-steering fluid leaks, engine oil or road grime can still degrade rubber over time.

When replacement’s due, it pays to:

• Use quality bushes (OE-style rubber for comfort, or reputable polyurethane for sharper response with a tad more NVH).
• Have the rack re-seated squarely and mounting hardware torqued to spec — EPS racks don’t like being pried or hammered.
• Book a wheel alignment afterwards, even tiny shifts at the rack can nudge toe out of spec and scrub tyres.

Typical signs the steering bushes on a Mark X need attention include a dull clunk over potholes, vague tracking at motorway speeds, tramlining, or uneven tyre wear that returns soon after alignment. Given the relatively low part cost and the big impact on steering feel, fresh bushes are a smart bit of preventative maintenance that keeps the Mark X feeling tight and confident on Aussie and Kiwi roads.

Popular questions

Does the 2015 Toyota Mark X actually have steering bushes?
Yes. Toyota’s GRX130 Repair Manual and EPC identify rubber “cushion” mounts for the steering rack. They isolate the rack from the subframe and are replaceable as service parts.

How often should steering bushes be replaced on a Mark X?
There’s no fixed interval, but inspection every 40,000–60,000 km is sensible. Replace if cracked, perished, oil-soaked, or if there’s play causing knocks, wander, or uneven tyre wear. Alignment should follow any bush change.

Rubber or polyurethane bushes — which is better?
Rubber keeps factory comfort and NVH. Polyurethane tightens steering response and longevity, handy for spirited driving, but can pass a touch more vibration. Choice depends on the driver’s priorities.