Parts for your 2019 Lexus Is-Rack boots

2019 Lexus IS rack boots – what they do, why they matter, and when to replace them

Based on Lexus/Toyota service literature and parts catalogues for the 2017–2020 IS range (Toyota TIS Repair Manual – Steering, and the Toyota/Lexus Electronic Parts Catalogue for GSE/ASE IS models), the 2019 Lexus IS uses a rack-and-pinion steering assembly with electric power assist (EPS). That rack is fitted with flexible bellows-style dust covers on each end, commonly called rack boots. They’re absolutely relevant on this model.

Rack boots seal the moving bits of the steering rack and inner tie rods from road grime, water, and grit. On an EPS-equipped IS, there’s no hydraulic fluid to leak, but the boots still keep the rack bar and inner joints clean and lightly greased, stopping premature wear and corrosion. They also help contain any grease flung off the inner joints during steering.

For a 2019 Lexus IS used on Aussie or Kiwi roads, regular inspections are a smart move. Workshops typically check the boots every 10–15,000 km or at annual servicing. If a boot is torn, split, or hard and cracked, it should be replaced promptly to protect the rack and inner tie rods. Leaving a split boot can let water in, which can chew out the inner joints and risk damage to the rack’s seals and guides.

Good practice when replacing rack boots on an IS:

• Use quality, model-correct boots and new clamps, don’t reuse stretched bands.
• Centre the steering and position the boot so it isn’t twisted at full lock.
• Lightly lubricate the inner lip to avoid nicking the boot on install.
• Ensure the boot can breathe/pressure-balance per service manual notes, don’t trap air.
• If inner tie rods are disturbed, get a wheel alignment check afterwards.

Typical warning signs are a visible split, grease sling on the crossmember, or a damp, gritty look around the inner tie rod area. The steering might still feel fine at first, but grit will start working away at the joint. Replacing a boot is far cheaper than a steering rack, so catching damage early saves coin and hassle.

Whether the IS is an IS 300, IS 350, or market-specific hybrid variant, the same principle applies: keep the rack boots intact, and the steering stays tight, quiet, and precise for the long haul.

Popular questions about 2019 Lexus IS rack boots

Do all 2019 Lexus IS models have rack boots, even with electric power steering?
Yes. Technical references for the 2017–2020 IS show an EPS rack-and-pinion with bellows boots on both ends. EPS replaces the hydraulic assist but doesn’t remove the need for dust boots that protect the rack bar and inner tie rods from contamination.

How often should rack boots be inspected or replaced on a 2019 IS?
Have them inspected at each regular service (about every 10–15,000 km or 12 months). Replacement isn’t time-based, it’s condition-based. If a boot shows cracks, splits, or loose clamps, replace it promptly to prevent inner joint and rack damage.

Can torn rack boots cause a wheel alignment issue?
A torn boot by itself won’t change alignment, but the grit it lets in can wear the inner tie rods, which will affect toe over time. If the inner tie rod is replaced or adjusted during boot work, get a wheel alignment check to keep the IS tracking straight and protect the tyres.