Parts for your 2003 Lexus Is-Rack boots

2003 Lexus IS rack boots: what they do and when to replace them

Yes, the 2003 Lexus IS (XE10 series, including IS200 and IS300) uses steering rack boots. Technical references that cover this include the Lexus factory repair manual’s Steering — Rack and Pinion section and the Toyota/Lexus Electronic Parts Catalogue (EPC), which list a “boot, steering gear” (bellows) and its clamps for both left and right sides. Aftermarket catalogues that mirror the EPC also show direct-fit rack boots for this model year.

On this Lexus, the rack boots (also called bellows or gaiters) are flexible sleeves that seal each end of the rack-and-pinion housing. Their job is to keep dust, water, and road grime away from the inner tie rods and the rack bar while allowing full steering travel. When the boots crack, split, or the clamps loosen, contaminants can chew out the inner tie rod joints and the rack seals. If power steering fluid collects inside a boot, that’s a red flag the rack seals are leaking — replacing the boot alone won’t fix a leaking rack.

There’s no set replacement interval in the service schedule, but Lexus service literature calls for inspection during routine servicing. For a 2003 IS used in Australia or New Zealand, a quick look at every oil change is smart, especially if the car sees unsealed roads or coastal air.

• Look for splits, perishing, or oil inside the boot.
• Check that both clamps are snug and boots aren’t twisted after previous work.
• If one boot has failed, consider replacing both sides and new clamps together.

Replacement is straightforward workshop fare: remove the outer tie rod end, slide off the old boot, clean the rack surface, and fit a new boot with the correct clamps. Alignment marks help, but because the tie rod end is disturbed, a wheel alignment is recommended. Use quality boots that match the OE profile, some aftermarket kits include a small breather or designated vent end — orient it as per the repair manual. A thin smear of silicone-free rubber grease on the inner lip can help the boot seat cleanly without rolling.

Pro tip: if a boot is ballooning with fluid or keeps getting wet with ATF, plan on steering rack seal repair or a replacement rack. New boots won’t cure an internal leak.

• Does a 2003 Lexus IS have rack boots?

It does. The Lexus factory repair manual for the XE10 platform and the Toyota/Lexus EPC list a steering rack boot (bellows) on both sides of the rack, along with dedicated clamps. Many reputable parts catalogues also show direct-fit rack boots for the 2003 IS200/IS300.

• How often should rack boots be replaced on a 2003 IS?

There’s no fixed kilometre interval. They’re an inspect-and-replace item: check at each service for cracks, splits, loose clamps, or fluid inside the boot. In harsh conditions or with age, expect they may need attention after a decade or so.

• Can rack boots be changed without needing a wheel alignment?

Because the outer tie rod end is usually removed to slide the boot off, the toe setting can shift. Even if counted turns are used, a post-replacement wheel alignment is recommended to protect tyres and ensure proper steering feel.