Parts for your 2012 Toyota Bb-Rack boots

2012 Toyota bB Rack Boots: What They Do and When to Replace

Based on Toyota’s technical literature, rack boots are absolutely fitted to the 2012 Toyota bB (QNC20/QNC21). The Toyota Electronic Parts Catalogue (EPC) lists a “Boot, Steering Gear” on both left and right sides in the Steering Gear & Linkage diagram, and the Toyota Repair Manual for the QNC20/QNC21 includes inspection and replacement procedures for the steering rack dust boots and inner rack ends. Aftermarket parts catalogues for the 2012 bB also catalogue left/right rack boots, reinforcing that this model uses conventional rack-and-pinion bellows.

On the 2012 Toyota bB, the rack boots (also called steering rack bellows) sit at each end of the rack-and-pinion housing. Their job is to keep dust, water, and road grime out of the rack and the inner tie-rod joints, and to hold the correct amount of grease around those joints. Whether the car runs electric or hydraulic assist, the boots are still crucial—split boots let grit chew out the rack ends and can accelerate wear on the rack itself.

Owners who drive plenty of open road or unsealed surfaces across Australia and New Zealand should keep an eye on the boots at regular services. Tell-tales include visible splits, perished rubber, oily residue weeping from inside the boot (a hint of an internal rack seal leak), or a clicking/clunking when turning. Uneven front tyre wear can also show up if the inner joints start to loosen after contaminants get in.

• Check intervals: Have the boots inspected every 10,000–15,000 km or at each service.
• When to replace: Any crack, tear, loose clamp, or contamination warrants replacement—don’t wait.
• Parts to renew: Boots and clamps are a must, many techs also replace the inner rack end if there’s any play.

Replacement is straightforward for a trained tech. The outer tie-rod end comes off, the old clamps are cut, and the boot slides away. The housing and rack end are cleaned, fresh grease is applied as per the Toyota manual, and a new boot and clamps are fitted. It’s vital not to over-twist the boot and to equalise the air inside so it doesn’t balloon or collapse at full lock. New clamp strength matters—avoid reusing old wire ties. If the inner tie-rod is disturbed or replaced, a wheel alignment should be carried out. Torque settings and grease specs should follow the Toyota Repair Manual for the QNC20/QNC21 bB. Done on time, new rack boots can save a rack assembly worth far more than the cost of the boots and a quick alignment.

Popular questions about 2012 Toyota bB rack boots

Does the 2012 Toyota bB actually have rack boots?
Yes. Toyota’s EPC shows a left and right “Boot, Steering Gear” for the QNC20/QNC21 bB, and the Toyota Repair Manual details inspection and replacement of the rack boots and inner rack ends. Most aftermarket catalogues list direct-fit boots for this model as well.

How long do rack boots last on a 2012 bB?
There’s no exact expiry, but many last well beyond 100,000 km in gentle use. Heat, UV, road grime, and off‑seal driving shorten their life. Having them checked every service and replaced at the first sign of cracking or splits is the best policy.

Do you need a wheel alignment after changing rack boots?
If only the boot and clamps are replaced and the tie-rod length setting is preserved precisely, alignment might be close. Realistically, if the outer or inner tie-rod is removed or adjusted, a proper alignment is recommended to protect tyres and steering feel.