Parts for your 2013 Toyota Bb-Control arms

2013 Toyota bB control arms — what they do and how to keep them sweet

Control arms are absolutely fitted to the 2013 Toyota bB. Technical sources including the Toyota bB Repair Manual for the QNC20/QNC21 series (Suspension section) and the Toyota Electronic Parts Catalogue confirm a front MacPherson strut setup with a lower control arm on each side, and a rear torsion-beam axle without traditional rear control arms. So, front control arms are relevant to servicing this model.

On the 2013 bB, the front lower control arms connect the chassis to the steering knuckle, keeping the wheel located through bumps, braking and cornering. They manage geometry like camber and caster, and—thanks to rubber bushes—absorb vibration so the cabin stays quiet. The ball joint at the arm’s outer end lets the wheel pivot for steering while keeping it firmly planted. Many bB arms are serviced as a complete assembly with pre-fitted bushes and a ball joint, which saves mucking about with presses and ensures everything’s aligned properly from the get-go.

Signs it’s time to look at the control arms or bushes include clunks over speed humps, vague or wandering steering, instability under braking, and uneven tyre wear. If the bB feels nervous in crosswinds or tramlines on coarse chip, worn bushes or a sloppy ball joint might be the culprit.

• Inspection: at each service or WOF/reg check, look for cracked or oil-soaked bushes, torn ball joint dust boots, and rust around mounting points. Any free play with the wheel lifted is a red flag.
• Replacement: many owners opt to replace arms in pairs to keep handling consistent left-to-right. Torque fasteners at normal ride height to avoid pre-loading the bushes.
• Alignment: always book a wheel alignment after arm or bush work—camber and toe can shift, and fresh tyres won’t last if alignment’s out.
• Parts choice: quality aftermarket or genuine arms with high-grade rubber or hydro-bushes will ride quieter and last longer, especially on Aussie and Kiwi roads.

There’s no fixed replacement interval, but it’s common to see bushes tired anywhere from 80,000 to 150,000 kilometres depending on driving and road conditions. Keeping tyres correctly inflated and avoiding kerb hits will help the control arms live a longer, happier life.

Popular questions about 2013 Toyota bB control arms

Does the 2013 Toyota bB have rear control arms?
The 2013 bB uses a torsion-beam rear axle, so it doesn’t have conventional upper and lower rear control arms like a multi-link setup. The front does have lower control arms, which are the common service items.

How long do bB control arm bushes typically last?
Anywhere from about 80,000 to 150,000 kilometres is normal, but it varies. Lots of city speed humps, potholes, and heat can age the rubber quicker. If there are clunks, vague steering, or uneven tyre wear, it’s time for an inspection.

Do I need a wheel alignment after replacing control arms on a bB?
Yes—100%. Changing arms or bushes can shift camber and toe. A proper alignment will restore straight-line stability and protect your tyres from premature wear.