Parts for your 2018 Toyota Vitz|yaris-Control arms

2018 Toyota Vitz/Yaris Control Arms: What They Do and When to Replace Them

Yes, the 2018 Toyota Vitz/Yaris uses control arms. Technical sources including the Toyota Repair Manual (Chassis) for the XP130 series and the Toyota Electronic Parts Catalogue list a “Front Suspension Arm Sub-Assembly, Lower No.1” for this model. That’s the front lower control arm, which locates the front wheels and allows them to move up and down while keeping geometry in check.

On the 2018 Vitz/Yaris, the front suspension is a MacPherson strut setup with a single lower control arm per side. Each arm carries a ball joint at the wheel end and rubber bushes where it mounts to the subframe. The rear uses a torsion beam, so there aren’t traditional rear control arms back there—most of the control-arm talk is about the front.

Purpose-wise, the control arms are the quiet achievers of the front end. They keep the wheel in the right spot fore/aft and across the car, manage caster and contribute to camber, and let the strut do its thing without the wheel flopping about. Fresh bushes soak up vibration, a tight ball joint keeps steering precise and braking stable.

As part of routine servicing on a 2018 Vitz/Yaris, it’s smart to inspect the front control arm bushes and ball joints every service or 15–20,000 km. Look for torn or perished bushes, leaking bush fluid (on fluid-filled types), cracked dust boots on the ball joint, and any free play. If the bushes are flogged out or the ball joint has play, replace the arm assembly (the ball joint is typically integrated). Always replace in pairs left/right to keep handling balanced, use new hardware where specified, and tighten mounting bolts at normal ride height to avoid preloading the bushes. A wheel alignment is a must afterwards.

Common signs the Vitz/Yaris might need control arms include:

• Clunks or knocks over bumps
• Steering wander, tramlining, or a vague on-centre feel
• Uneven or rapid tyre wear
• Shimmy under braking

Quality matters. Genuine or reputable aftermarket arms with good-quality bushes will last longer and keep the car tracking straight. If you’re DIY-ing, support the vehicle safely, follow factory torque specs from the Toyota manual, and book an alignment straight after the job. For WOF/rego peace of mind in NZ and Australia, a tidy front end with healthy control arms pays off in safer, straighter, quieter motoring.

FAQs

Does the 2018 Toyota Vitz/Yaris have control arms?
Yes. Technical documentation (Toyota Repair Manual for XP130 front suspension, and Toyota EPC) shows a front lower control arm on each side. The rear uses a torsion beam, so no traditional rear control arms.

What are the symptoms of worn control arm bushes or ball joints?
Clunks over bumps, steering vagueness, uneven tyre wear, and a shimmy under braking are common. Visual checks may reveal torn bushes or split ball joint boots and measurable free play.

Do I need a wheel alignment after replacing control arms?
Absolutely. Replacing the arms can alter toe and caster, so an alignment is recommended straight after to protect tyres and restore proper steering feel.