Parts for your 2003 Toyota Bb-Rack boots

2003 Toyota bB rackboots — what they do and when to replace them

Based on technical references including the Toyota bB (NCP30/NCP31) repair manual steering section and Toyota’s Electronic Parts Catalogue, the 2003 Toyota bB uses rack-and-pinion steering with protective bellows on each end of the rack. These bellows are commonly called rackboots. The equivalent Scion xB (first generation) workshop literature shows the same setup. So yes — rackboots are fitted to the 2003 Toyota bB, and they matter.

On this model, rackboots shield the inner tie rods and the rack bar from grit, water, and road splash, and help retain the correct lubricant at the joint. Even on variants with electric column-assist power steering, the mechanical rack still relies on intact rackboots to keep wear down and steering feel tidy.

For owners and workshops, a quick look at the rackboots should be part of every service at typical 10,000–15,000 km intervals. If the boots are cracked, torn, oil-soaked, or the clamps are loose, they should be replaced promptly. Driving with split boots lets in dust and water that can chew out the inner tie rods and the rack itself, often turning a cheap boot replacement into a bigger steering repair. In New Zealand and Australia, split steering boots can also lead to a WOF/roadworthy fail.

• Common signs a 2003 Toyota bB rackboot needs attention: visible cracks or tears, damp grease weeping out, a missing or loose clamp, or grit tracked under the bellows.
• Helpful service tips: replace boots in pairs, inspect inner tie rods for play at the same time, and plan a wheel alignment after any tie-rod work.

Replacement is straightforward with the right approach. Mark the outer tie-rod jam-nut position to preserve toe, remove the outer tie rod, cut the old clamps, slide the old boot off, and clean the area. Don’t over-pack the new boot with grease unless the manual specifies it, use fresh clamps and ensure any breather or equaliser path between boots isn’t blocked so the bellows can move freely as the rack travels. If an inner tie rod is loose, sort it while you’re there — it’s the most cost-effective time.

Quality matters. Genuine-type or reputable aftermarket rackboots shaped for the bB’s rack will fit better and last longer than generic universals. For a car that’s now two decades old, fresh boots are cheap insurance to keep the 2003 Toyota bB steering sweet and compliant over Aussie and Kiwi roads.

Popular questions about 2003 Toyota bB rackboots

How often should rackboots be replaced on a 2003 Toyota bB?

There’s no fixed kilometre interval — they’re replaced on condition. Check them at each service and replace if they’re cracked, torn, weeping, or the clamps are loose. Many last well past 100,000 km, but age, heat, and road grime can accelerate cracking.

If one side has failed, it’s smart to replace both boots together and book a wheel alignment if the tie rods were disturbed.

Can someone keep driving a 2003 bB with a split rackboot?

It’s not recommended. A split boot lets water and grit into the inner tie-rod joint and along the rack bar, which can quickly wear components and affect steering feel and safety.

Beyond the repair risk, split steering boots are likely to fail a WOF or roadworthy in NZ and Australia, so it’s best to sort them promptly.

Does a 2003 bB with electric power steering still need rackboots?

Yes. The power assist on many bB models is at the steering column, but the car still uses a mechanical rack-and-pinion. Rackboots protect the inner tie rods and rack from contamination even without hydraulic fluid in the rack housing.

Keeping the boots intact preserves smooth steering, reduces wear, and avoids avoidable spend on inner tie rods and the rack itself.