Parts for your 2004 Lexus Is-Rack boots

2004 Lexus IS rack boots: what they do and when to replace them

Based on the Lexus/Toyota Repair Manual for the XE10-chassis IS200/IS300 (2004) and the Toyota/Lexus Electronic Parts Catalogue, the 2004 Lexus IS is definitely fitted with steering rack boots (also called rack bellows). These flexible boots sit on each end of the rack-and-pinion steering gear and are a normal service item on this model.

On the 2004 Lexus IS, rack boots act like concertina-style dust covers that seal the inner tie-rod joints and the polished rack bar from grit, water, and road grime. Because the steering rack is a precision hydraulic unit, any contamination can chew out the inner joints and rack seals in short order. The boots also contain a light film of grease around the inner tie rods, helping those joints move smoothly while the steering gets worked hard around town and on the open road.

For servicing, the boots deserve a regular glance whenever the car is on a hoist—think every 10,000–15,000 kilometres or at routine oil-change intervals. If a boot is cracked, split, or soaked with power steering fluid (a sign of a leaking rack seal), it’s time to sort it. Leaving a torn boot can turn a quick job into a pricey steering rack rebuild and can raise a red flag at a WOF check.

Replacement is straightforward for a competent tech: centre the steering, remove the outer tie rod, slide off the damaged boot, and fit a quality replacement with proper clamps. It’s important the boot isn’t twisted and that the small vent pathway remains open so the bellows can compress and expand freely lock-to-lock. After reassembly, a wheel alignment is recommended because the outer tie rod has been disturbed.

Good-quality aftermarket boots are widely available, though many owners prefer OE-spec items listed in the Lexus/Toyota EPC as “Boot, Steering Rack.” Using the correct diameter at both ends and the right clamp style prevents chafing and water ingress. A quick check under the bonnet for power steering fluid level and on the ground for drips is also smart, as fluid contamination can accelerate rubber deterioration.

• Tell-tales to watch: visible splits or perishing, grease flung onto the control arms, wet boots from power steering fluid, knocking or looseness from inner tie rods, and WOF advisories for steering dust covers.
• Best practice: inspect at each service, replace in pairs if they’re the same age, and book an alignment afterwards.

Does a 2004 Lexus IS have rack boots?

Yes. The XE10-series IS200/IS300 uses a rack-and-pinion steering gear with flexible rack boots (bellows) on both ends. Lexus/Toyota service literature and the factory parts catalogue list them as standard components.

How often should rack boots be checked or replaced?

Inspection at every service is sensible. Replacement isn’t time-based, it’s condition-based. If a boot shows cracking, splits, or oil contamination—or if there’s play in the inner tie rod—replacement should be done promptly to protect the steering rack and keep the car WOF-ready.

Are left and right rack boots the same on the 2004 IS?

On many Toyota/Lexus racks of this era the left and right boots are the same part number, but buyers should confirm by VIN against the Lexus/Toyota EPC. Using the correct boot ensures proper sealing and full steering travel without rubbing.