Parts for your 2010 Toyota Bb-Steering rack

2010 Toyota bB Steering Rack: What It Does and How to Look After It

Based on Toyota’s technical literature for the 2010 bB (QNC20/21/25) — including the Toyota Electronic Parts Catalogue (listing a Steering Gear Assembly and Rack End Sub‑Assembly) and the service/workshop manuals and New Car Features guide — this vehicle uses a rack‑and‑pinion steering rack with electric power steering (column‑assist). So yes, a steering rack is fitted and it’s central to how the bB steers.

On a 2010 Toyota bB, the steering rack converts the driver’s steering‑wheel rotation into the side‑to‑side movement that turns the front wheels. It’s a compact, accurate setup that gives tidy road feel around town and on the motorway. The bB’s electric power steering assists at the column, so there’s no hydraulic pump, fluid or hoses to maintain, but the rack itself still has inner tie rods, outer tie rod ends and flexible boots that need a periodic once‑over.

As part of regular servicing, this steering rack is best kept in shape with simple, consistent checks. A technician will look for split rack boots (they can let grit in and grease out), any free play in the inner tie rods, and looseness or worn ball joints in the outer tie rod ends. If there’s a light knock over bumps, vague steering, tramlining, uneven tyre wear, or the wheel won’t sit dead‑centre, those are cues to inspect the rack and its related hardware.

Where the rack is sound, it’s common to replace just the inner tie rods or outer tie rod ends and fit new boots. That’s cost‑effective and restores steering precision. If a complete rack has to be replaced — typically after impact damage or severe internal wear — it’s important to centre the rack, set preliminary toe by matching tie‑rod lengths, and then carry out a proper wheel alignment. Because the bB uses electric assist, a steering angle sensor calibration and an EPS system health check with a scan tool may be required so the assist behaves correctly and warning lights stay off.

There’s no power steering fluid to flush on this model, so maintenance is mostly about inspection, timely replacement of worn ends/boots, and good alignment practice. Done right, the original rack can last well past 200,000 km, especially if tyres are kept at the right pressures and suspension bushings are in good nick.

• Inspect rack boots and tie rods at each service or every 10,000–15,000 km.
• Replace split boots quickly to protect the rack.
• Always follow up steering work with a quality wheel alignment and centre the wheel.

Popular questions about 2010 Toyota bB steering racks

Does the 2010 Toyota bB have a steering rack or a steering box?

It has a rack‑and‑pinion steering rack with electric power assistance at the column. There’s no hydraulic pump or fluid, but the rack, inner tie rods, outer tie rod ends and boots are very much there and serviceable.

How long does a steering rack usually last on a 2010 bB?

With tidy roads and regular checks, the factory rack often goes 200,000 km or more. The bits that wear first are usually the inner tie rods, outer tie rod ends and the protective boots, which are straightforward to replace.

What symptoms point to a worn steering rack or tie rods on a bB?

Clunks over bumps, a loose or notchy feel at the wheel, wandering at highway speeds, uneven tyre wear, or a steering wheel that won’t sit centred after driving straight. Any of these are a good reason to book an inspection and alignment.