Parts for your 2009 Toyota Bb-Wheel hubs

2009 Toyota bB wheel-hubs — what they do and how to look after them

Wheel-hubs are absolutely used on the 2009 Toyota bB. Toyota’s Electronic Parts Catalogue (EPC) for the QNC20/QNC21 series and the Toyota/Daihatsu workshop literature for this platform identify bolt-on front hub and bearing units, plus rear hub assemblies (integrated with drum brakes on most trims, with ABS tone rings where fitted). The bB shares core running gear with the Daihatsu Materia, which uses the same sealed hub-and-bearing setup — making wheel-hubs fully relevant to this model year.

On the 2009 bB, the wheel-hub is the central mounting point that the wheel bolts onto. Inside the hub lives a sealed bearing that lets the wheel spin smoothly while carrying the car’s weight and the loads from cornering and braking. On ABS-equipped cars, the hub or bearing also carries the encoder ring that your speed sensors read, so a crook bearing can even kick up an ABS light. Up front, the hub assembly bolts to the steering knuckle and splines to the driveshaft, down the back it’s a compact hub unit, typically part of the drum assembly. It’s all designed as a sealed unit — no greasing or adjusting like the old-school taper bearings.

Because the bearings are sealed, “maintenance” is mostly about regular checks and good habits. At each service, it’s smart to spin and feel each wheel for roughness, listen for hums or drones on the road, and check for play with the wheel off the ground. Keep wheel nuts torqued correctly, avoid pressure-washing straight at the hub, and try not to clout kerbs — all of which shorten bearing life. If you do a lot of kilometres on coarse-chip rural roads or splash through floodwater, inspections matter even more.

When replacement time rolls around, the bB’s hub units are straightforward: they’re designed to be swapped as a complete assembly. Use quality hubs (OE or reputable aftermarket), a new staked axle nut at the front, and take care around the ABS sensor and wiring. Don’t try to press the bearing out of the hub — these units aren’t serviceable that way. After fitting, clear any ABS fault codes and road test. An alignment usually isn’t required unless you’ve disturbed suspension bolts, but it’s never a bad idea to check tyre wear and steering feel.

• Common signs it’s time: a speed-related growl or rumble, play at 12 and 6 o’clock, ABS light from a noisy encoder, or uneven tyre wear paired with noise.
• Inspection cadence: give the wheel-hubs a quick check every service (10,000–15,000 km) or before big road trips.

Popular questions about 2009 Toyota bB wheel-hubs

Do the 2009 bB’s bearings get serviced, or do you replace the whole hub?
The 2009 Toyota bB uses sealed, bolt-on hub and bearing units. They’re not meant to be stripped and regreased. When worn, replace the complete hub assembly. This keeps things reliable and protects the ABS encoder from damage.

How can someone tell if a bB hub bearing is failing?
Listen for a humming or droning that gets louder with speed and may change when cornering. Jack the car safely, spin the wheel by hand and feel for roughness, then check for play by rocking the wheel at 12 and 6 o’clock. Any rumble, notchiness, or movement points to a tired hub. An intermittent ABS light can also be a clue.

Is a wheel alignment needed after replacing a hub on a bB?
Usually no. The hub bolts to the knuckle and doesn’t set camber or toe. If you had to loosen suspension bolts or if the steering wheel sits off-centre after the job, get an alignment check to be safe.