Parts for your 2012 Lexus Is-Steering bushes

2012 Lexus IS steering bushes — what they do and when to replace them

Based on technical references including the Lexus IS (GSE20/21/25, USE20) Repair Manual (Steering – Steering Gear & Linkage) and Toyota’s Electronic Parts Catalogue, the 2012 Lexus IS uses steering rack mounting “cushion” bushes to secure the rack-and-pinion to the front subframe. Aftermarket catalogues (e.g., SuperPro and Whiteline) also list steering rack mount bush kits for the 2005–2013 IS range. So yes — steering bushes are very much relevant on the 2012 Lexus IS (IS 250/350 and IS F).

These bushes have a simple job that makes a big difference: they clamp the steering rack in place while soaking up vibration and harshness. By isolating road shock and keeping the rack located under load, they help the Lexus steer cleanly on centre, track straight at motorway speeds, and feel settled when cornering on rough chipseal. Most are rubber (for comfort), with polyurethane upgrades available for a crisper feel.

As kilometres stack up, rubber can harden, crack or collapse. Oil contamination from engine or power-steering fluid (IS F/hydraulic variants) can speed this up. Tell-tale signs include knock or clunk over sharp bumps, vague or wandering steering, rack movement felt through the wheel on turn-in, and feathering on the inner or outer shoulders of the front tyres.

During routine servicing, it’s smart to inspect the rack bushes every 40,000–60,000 km. Look for splits, deformation, looseness in the brackets, or evidence of the rack shifting. If replacement is due, doing both sides together is best practice. Support the rack, mark bracket positions, and torque fasteners to spec from the Lexus manual. On IS models with EPS, a steering angle calibration may be required after battery disconnect, on hydraulic systems (IS F and some markets), bleed the system and check for leaks that could attack new rubber.

Owners chasing comfort and OE feel should stick with genuine-style rubber. Those wanting sharper response can consider quality polyurethane, understanding there may be a touch more NVH. After any steering bushing work, a wheel alignment is recommended to keep the IS tracking arrow-straight.

• Typical service life: often 100,000–150,000 km, sooner if exposed to leaks or rough roads.
• Avoid solvent sprays on or near the bushes, fix fluid leaks promptly.
• Re-check bracket torque after a few hundred kilometres.

Popular questions about 2012 Lexus IS steering bushes

Does the 2012 Lexus IS have steering rack bushes?
Yes. Lexus documentation calls them rack mounting “cushions”. They secure and isolate the rack on IS 250/350 (EPS or hydraulic, market-dependent) and IS F models.

How long do the bushes last, and what are the signs they’re worn?
Many last 100,000–150,000 km. Clunks over bumps, vague on-centre feel, and the rack shifting when the wheel is rocked can all point to tired bushes. Uneven front tyre wear can also show up.

Is a wheel alignment needed after replacing steering bushes?
It’s strongly recommended. While the tie-rod lengths don’t change, the rack’s position can, and a fresh alignment will ensure correct toe and straight-line stability.