Parts for your 2012 Mazda Premacy-Control arms

2012 Mazda Premacy control arms: what they do and when to service them

Technical sources confirm that the 2012 Mazda Premacy (CW, also sold as Mazda 5) is fitted with control arms. The Mazda factory Workshop Manual for the CW series specifies a MacPherson-strut front suspension using a lower control arm with an integral ball joint and two bushes, and a multi-link rear suspension employing several control arms. Mazda’s Electronic Parts Catalogue, along with aftermarket catalogues from major suppliers, list complete front lower control arm assemblies and rear links for this model, confirming their use on the vehicle.

On the Premacy, control arms locate the wheels and let the suspension move in a controlled arc, keeping tyre contact steady over bumps, braking and cornering. Up front, the lower arm ties the hub to the subframe via bushes and a ball joint, filtering vibration and setting geometry. At the rear, the multi-link layout uses several arms to manage toe and camber through the suspension’s travel, giving the compact people-mover its tidy, car-like handling.

As bushes and ball joints wear, handling gets sloppy and tyres can suffer. Owners should watch for:

• Clunks or knocks over potholes and speed humps
• Steering shimmy or pull, especially under braking
• Uneven or rapid tyre wear on the inner or outer edges
• Rear-end wiggle or instability over mid-corner bumps
• Visible bush cracking or torn ball-joint boots

When replacement’s due, many workshops fit complete front lower arms rather than pressing bushes and joints individually, as it saves time and restores feel in one hit. Quality aftermarket arms are fine, but stick with known brands. Replace hardware where specified by the manual, torque all fasteners at normal ride height, and book a four-wheel alignment straight after—rear toe/camber on the multi-link can drift with even small changes. If one side is badly worn, it’s smart to replace the pair to keep braking and steering behaviour even.

For routine servicing, have the control arm bushes and ball joints inspected every service or about 15,000 km, especially if the vehicle sees rough roads or speed bumps. Keep tyres at correct pressures, rotate on schedule and address any kerb strikes or pothole hits promptly. A little preventative attention here keeps the Premacy quiet, precise and easy on its tyres.

How long do control arm bushes last on a 2012 Premacy?

In typical NZ and Australian conditions, front lower arm bushes often last 80,000–140,000 km, but life varies with road quality, loading and driving style. City cars that live on speed humps or carry the family and gear daily may need bushes sooner. Regular inspections catch small splits before they become thumps.

Is it better to replace the whole arm or just the bushes and ball joint?

For many owners, a complete arm is the fuss-free option: new bushes and ball joint pre-fitted, consistent results and less labour. If the arm itself is in top nick and you want to save, pressing quality bushes and a new joint can work—just ensure proper tools are used and geometry is checked after.

Do you need a wheel alignment after control arm work?

Yes. Any change to the arms or their bushes alters alignment, and the Premacy’s multi-link rear is sensitive to small shifts. A four-wheel alignment brings camber and toe back to spec, protects your tyres and restores the crisp steering feel these cars are known for.