Parts for your 2018 Lexus Is-Steering bushes

2018 Lexus IS steering bushes — are they even a thing?

For the 2018 Lexus IS (XE30 series — IS300/IS350), separate “steering bushes” aren’t a service item or a standalone part. Technical references back this up: the Lexus/Toyota Electronic Parts Catalogue for the 2018 IS lists the complete electric power steering (EPS) rack assembly (steering gear) along with tie rods, boots and fasteners, but no individual rack-mount bushes are shown or sold for this model. Likewise, the Lexus Repair Manual procedures for steering gear removal/installation specify replacing or servicing the rack assembly rather than any rack mounting bushes. In other words, there’s no discrete bush kit to press in and out on this generation IS — the rack is designed to mount rigidly with its own integrated isolation and sleeves built into the housing/brackets.

Why did Lexus go this way? The XE30 runs an EPS rack that relies on precise mounting for steering feel, lane‑keeping and stability control integration. By making the rack a rigid, one-piece unit with its NVH tuning baked in, Lexus removes a compliance point that could dull feedback or introduce variability over time. It also streamlines service: if there’s play at the rack mounts, the prescribed fix is to inspect fasteners and subframe, then replace the steering gear assembly if movement persists, rather than swapping separate bushes.

Plenty of owners search for “steering bushes” because earlier Lexus IS generations and other Toyotas often used replaceable rack bushes or had popular polyurethane upgrades. That doesn’t carry over to the 2018 IS. If the steering feels loose, clunks on bumps or wanders, the usual suspects are elsewhere:

• Inner/outer tie rods and ball joints
• Front lower control arm bushes (suspension, not steering)
• Wheel alignment and tyre condition/pressures
• Intermediate shaft/universal joints, or incorrect rack/subframe fastener torque

For routine servicing, a good workshop will road test, check for play at the tie rods, verify rack and subframe bolt torque, assess control arm bushes and confirm alignment. If there’s confirmed movement at the rack body itself, factory guidance is to replace the complete steering gear rather than hunt for non-existent bushes. That’s perfectly normal for modern EPS setups on late‑model Lexus and Toyota platforms.

Does the 2018 Lexus IS have replaceable steering rack bushes?

No. The 2018 IS uses an electric power steering rack that mounts without separate, serviceable rack bushes. The Toyota/Lexus EPC doesn’t list a “bush, steering rack” for this model, and the Lexus Repair Manual covers rack assembly replacement instead. Serviceable steering items are the tie rods, boots and related fasteners.

What symptoms feel like worn steering bushes on a 2018 IS, and where should a tech look?

Vague steering, a clunk over bumps or tramlining can mimic “worn bushes”, but on this car the likely causes are inner/outer tie rods, lower control arm bushes, or alignment and tyre issues. A technician should also check the intermediate shaft joints and confirm the rack and subframe bolts are torqued correctly.

Can aftermarket polyurethane steering bushes be fitted to this model?

Not practically. Popular poly bush kits exist for some earlier IS generations, but there’s no mainstream kit for the 2018 IS because the rack doesn’t use separate bushes. Any attempt to retrofit would mean custom fabrication and is generally not recommended for a road car relying on EPS calibration and safety systems.