Parts for your 2005 Subaru Impreza-Control arms

2005 Subaru Impreza Control Arms — What They Do and When to Replace Them

Control arms are absolutely fitted to the 2005 Subaru Impreza. Subaru’s Factory Service Manual for the 2005 Impreza (GD/GG), the Subaru parts catalogue, and independent workshop manuals all identify a front lower control arm (also called a transverse link or wishbone) as part of the MacPherson strut front suspension. Rear suspension uses lateral links and trailing arms. On WRX STI variants, the front arms are aluminium, most other trims use pressed steel. So, yes — control arms are relevant on this model.

On this Impreza, the control arm locates the front wheel hub in the correct position and arc as the suspension moves, keeping alignment steady under braking, cornering and over bumps. The arm pivots on rubber bushes at the subframe and carries a ball joint to the knuckle, so it’s central to steering feel, tyre wear and braking stability. Subaru documentation calls out regular inspection of bushes and ball joint boots, because once wear sets in, handling and safety take a hit.

Owners who keep their 2005 Impreza in top nick usually check control arm bushes and ball joints at every service or at least every 20,000 km. Typical signs it’s time for fresh arms or bushes include:

• Clunks or knocks over speed humps or potholes
• Steering wander, vague turn-in, or pull under braking
• Uneven or rapid inner/outer tyre wear
• Shudder or vibration through the wheel on rough roads

Replacing just the worn bushes or the complete arm assembly are both valid approaches. Complete arms (with pre-pressed bushes and a new ball joint) save time and avoid press work, bush-only jobs are budget-friendly but require proper tools and alignment afterwards. Subaru service material and common workshop practice recommend:

• Replace in axle pairs to keep geometry even left-to-right
• Use new hardware where specified and torque with the vehicle at ride height
• Book a full wheel alignment — toe and camber will shift when arms or bushes are changed
• Select the correct arm type for your trim (steel vs aluminium, different bush specs on STI)

With fresh bushes and tight ball joints, a 2005 Impreza feels planted and predictable, preserving tyres and confidence whether it’s the daily commute or a spirited weekend run.

Popular questions about 2005 Subaru Impreza control arms

Do 2005 Subaru Imprezas actually have control arms?
They do. The front suspension uses a lower control arm (transverse link) with a ball joint, and the rear uses lateral and trailing arms. STI models often have aluminium front arms, other trims generally run steel arms.

How often should the control arm bushes or ball joints be replaced?
There’s no fixed kilometre limit, but inspection every service or ~20,000 km is wise. Many cars need attention between 100,000 and 200,000 km, sooner if driven on rough roads or with performance tyres and hard cornering.

Do I need a wheel alignment after replacing control arms?
Yes. Changing arms or bushes alters suspension geometry. A proper alignment resets camber, caster and toe, protecting tyres and restoring straight-line stability and steering feel.