Parts for your 2006 Toyota Bb-Rack boots

2006 Toyota bB rack boots — what they do and when to replace them

Based on technical references including the Toyota Electronic Parts Catalog (EPC, Steering Gear & Link section) and the Toyota bB workshop manuals for NCP30/NCP31 (first-gen) and QNC21 (second-gen, from 2005), the 2006 Toyota bB uses a rack-and-pinion steering gear that is fitted with two rack boots (also called steering rack gaiters). The EPC lists “Boot, Steering Rack” for these bB models, with typical genuine part numbers seen in catalogues such as 45535-52050 for NCP30/31 and 45535-B1010/B1020 for QNC21 (VIN-dependent). Aftermarket catalogues echo this fitment. So rack boots are indeed relevant and used on the 2006 Toyota bB.

On this model, the rack boots are flexible bellows that seal the ends of the steering rack where the inner tie rods attach. Their job is to keep dust, water, and road grit out of the rack, retain grease around the inner joints, and protect the rack seals. Whether the bB is column-assist electric power steering or hydraulic assist (market/grade dependent), the mechanical rack still relies on intact boots.

If a boot splits, water and grit can chew out the inner tie-rod joint and corrode the rack, leading to play in the steering, noises on turns, and potential WOF/RWC failures. During routine servicing, a quick look under the front with the wheels turned lock-to-lock should confirm the boots aren’t cracked, oil-wet, or slipping off their clamps.

Replacement is straightforward but benefits from proper tools and a post-job wheel alignment. Typical steps include removing the front wheel, loosening the tie-rod end locknut, separating the tie-rod end from the knuckle, cutting the old clamps, sliding the old boot off, checking the inner tie rod and rack for wear, then fitting the new boot with fresh clamps. The boot must sit squarely in its grooves, not twisted, and should compress/expand freely through steering travel. Torque specs and alignment settings should be taken from the factory manual for the exact variant.

• Check every service (10,000–15,000 km): look for splits, hardening, or oily residue.
• Replace in pairs if the rubber is ageing or cracking.
• Always use new clamps, avoid cable ties that can loosen.
• Get a professional wheel alignment after any tie-rod or boot work.

For parts ordering, use the VIN to confirm the correct boot and clamp kit as listings differ between NCP30/31 and QNC21.

Popular questions about 2006 Toyota bB rack boots

How can someone tell if their 2006 bB’s rack boots need replacing?

They’ll often spot small splits or perishing in the bellows, grease flung onto the lower control arm, or dampness from power steering fluid if the rack seals are weeping. A light knock over bumps or vague steering can hint at inner tie-rod wear caused by a torn boot. Turning the steering full lock both ways with a torch makes inspection easier.

Can rack boots be replaced at home, or is a workshop best?

DIY is feasible with stands, a tie-rod separator, and a boot clamp tool, but care is needed to preserve toe settings and not damage the rack lips. Most owners opt for a workshop because an alignment is recommended afterwards. If the inner tie rod shows play once the boot is off, it’s smart to replace that at the same time.

Do new rack boots require lubrication?

The inner joint should have a thin smear of suitable grease as specified in the service manual, don’t pack the boot with grease. Ensure the boot breathes correctly and isn’t kinked or stretched at full lock, then secure it with proper clamps to factory spec.