Parts for your 2012 Toyota Bb-Rack boots

2012 Toyota bB rack boots — what they do, how they wear, and when to replace

Based on Toyota’s own technical documentation for the QNC20/21/25-series bB (2012 model year) — including the Toyota Repair Manual steering section and the Toyota Electronic Parts Catalog categories for Steering Gear &, Link — the vehicle uses a rack-and-pinion steering assembly with bellows-style dust boots (commonly called rack boots). These boots are therefore relevant and fitted on the 2012 Toyota bB.

On the 2012 Toyota bB, rack boots sit over each end of the steering rack to keep grit, water, and road spray out of the inner tie rod and rack gear. They act like flexible bellows that move with steering while sealing the joint, helping the steering feel stay tight and smooth over many kilometres. For models configured with electric power steering (common on the bB), the rack boots still do the same protective job, just without any hydraulic fluid behind them.

When rack boots split or clamps loosen, contaminants get in and grease works its way out. Left unattended, the inner tie rod and rack can wear quickly, leading to play at the wheel, uneven tyre wear, or a knock over bumps. If the car were hydraulic (some markets), fluid misting inside a torn boot could also be seen — but most 2012 bB variants run electric assist, so fluid leaks aren’t expected.

Service-wise, rack boots aren’t a set-interval item, they’re inspected each service, at rego/WOF checks, or whenever there’s steering play. Replacement is straightforward workshop work but does need care. The outer tie rod end is removed, the old boot and clamps come off, and a new boot is slid on and correctly clamped. Because the tie rod end position changes during the job, a wheel alignment is recommended immediately after.

• Tell-tales a bB needs rack boots: visible splits or perishing, grease flung on the inner guard, loose/missing clamps, or moisture/dirt inside the boot.
• Best practice: quality OE-style boots and proper ear/stepless clamps — skip cable ties.
• Post-repair: torque fasteners to spec per Toyota service info and book an alignment.

Owners can expect long life from new rack boots in Australian and New Zealand conditions if they’re checked routinely, especially after rough-road driving, flood exposure, or a failed inner guard liner that can spray debris at the rack area.

Popular questions

Are rack boots and CV boots the same on a 2012 Toyota bB?

No. Rack boots protect the steering rack and inner tie rods, CV boots protect constant-velocity joints on the driveshafts. They look similar as bellows, but they’re different parts in different locations and aren’t interchangeable.

How can someone spot a failing rack boot on a 2012 bB?

Look for cracks in the pleats, splits near the small end, loose or missing clamps, or grease flung around the subframe. Turning the wheels to full lock helps expose the pleats so any damage is easier to see.

Is a wheel alignment needed after replacing rack boots on a 2012 Toyota bB?

Yes, it’s strongly recommended. Removing the tie rod end to change the boot can alter toe settings. An alignment helps protect tyres and keeps steering feel consistent.