Parts for your 2007 Toyota Bb-Steering rack

2007 Toyota bB Steering Rack: what it does, and how to look after it

Based on Toyota’s factory Repair Manual and Electronic Parts Catalogue for the second‑generation bB (QNC20/QNC21, 2005–2016), the 2007 Toyota bB is fitted with a rack‑and‑pinion steering rack. The model uses electric power steering (EPS) with column assist, but the mechanical steering gear is still a conventional rack assembly (listed by Toyota as the “Steering Gear Assembly”). So a steering rack is absolutely relevant to the 2007 bB.

On this bB, the steering rack converts the driver’s steering wheel input into the left‑right movement of the tie rods, which turns the front wheels and keeps toe angles steady through bumps and cornering. The EPS motor provides assist at the column, so there are no hydraulic lines at the rack, but the rack still handles all the actual wheel direction and road feedback.

For servicing, the focus is on inspection and preventing wear. There’s no power‑steering fluid to change on this EPS setup, so attention turns to boots, joints, and alignment. Torn rack boots (bellows) let dust and water in, which quickly chews out inner rack ends. Free play at the wheel, clunks over corrugations, wandering on the motorway, or uneven tyre wear are signs to check the inner and outer tie rods, rack mounts, and column joints. Any play should be addressed early to keep tyres happy and keep it safe for WOF/rego.

If replacement is needed, many owners go for a quality reconditioned rack or a low‑km genuine used unit. The job typically involves disconnecting the column joint, removing tie rod ends, freeing the rack from the crossmember, and refitting with new self‑locking fasteners where specified. Always centre the rack, keep the steering wheel locked to protect the clock spring, and after installation, perform a wheel alignment. Some bB variants may also require EPS/steering angle sensor centring with a scan tool so the assist feels natural again.

Helpful tips for Aussie and Kiwi owners:

• Inspect rack boots and tie rod ends every 10,000–15,000 km or at each service.
• Replace torn boots immediately and re‑grease to extend rack life.
• If the steering feels notchy or off‑centre after work, get the alignment checked and the angle sensor calibrated.
• Use OEM‑spec parts and correct torque values, a loose inner tie rod can damage the rack bar.

Popular questions about 2007 Toyota bB steering racks

Does the 2007 Toyota bB use electric or hydraulic power steering, and does that change the rack?

The 2007 bB uses electric power steering with column assist. That means the rack itself doesn’t have hydraulic ports or hoses, but it’s still a standard rack‑and‑pinion unit doing the steering. EPS issues tend to live at the column or with sensors, while wear in the rack shows up as play or knocks at the wheels.

What are common signs the steering rack on a 2007 bB is worn?

Tell‑tales include clunking over bumps, a loose or vague on‑centre feel, uneven front tyre wear, steering wander, and torn rack boots with grease contamination. Excess play in the inner tie rods is very common, if ignored, it can mark the rack bar and make things worse.

Can a home mechanic replace the rack on a 2007 bB?

Yes, with stands, proper tools, and care. Expect to disconnect the column joint, tie rods, and rack mounts, and sometimes lower the crossmember slightly. Lock the steering wheel to protect the clock spring, torque fasteners to spec, and finish with a wheel alignment. If the steering angle sensor gets upset, a quick calibration with a scan tool may be needed.