Parts for your 2023 Subaru Impreza-Control arms

2023 Subaru Impreza Control Arms: What They Do and When to Service Them

Control arms are absolutely fitted to the 2023 Subaru Impreza. Subaru’s service manual (STIS) for the MY2023 Impreza specifies a MacPherson strut front suspension that uses a lower control arm (also called a transverse link) with a ball joint and rubber/hydraulic bushes. The rear independent double-wishbone layout uses multiple links/arms that function as control arms to locate the hub. These components are also listed in Subaru’s genuine parts catalogues and appear across reputable parts databases for the 2017–2023 Impreza on the Subaru Global Platform. These technical sources collectively confirm the Impreza uses control arms front and rear.

On the 2023 Impreza, the control arms keep the wheels tracking straight and true by controlling camber and caster through the suspension’s range of motion. They connect the chassis to the steering knuckle via a ball joint up front, with compliant bushes that soak up bumps and road harshness. Because they manage wheel alignment under load, healthy arms and bushes mean better steering feel, stable braking, even tyre wear, and a quieter ride.

There’s no fixed replacement interval, but as part of regular servicing it’s smart to inspect the control arms and bushes every 10,000–15,000 km (or at each service). Look for split or leaking hydro-bushes, perished rubber, torn ball joint boots, or any free play. If the vehicle feels vague, tramlines, or develops clunks over bumps, it’s time for a closer look.

• Common signs of wear: knocking over speed humps, steering shimmy, uneven tyre wear, instability under braking, and a “floaty” front end.
• Best practice on replacement: torque all fasteners to spec and do the final tighten at ride height so bushes aren’t preloaded.
• Always follow up with a four-wheel alignment, fresh arms or bushes will shift geometry.

Quality aftermarket bushes or complete arm assemblies can sharpen steering and extend service life, but sticking with OE-equivalent specs keeps the ride compliant, which suits daily driving across Aussie and Kiwi roads. If one front lower control arm is worn, replacing in pairs helps keep handling balanced. And don’t forget the rear: the double-wishbone links/arms deserve the same periodic check so the Impreza keeps its planted, confidence-inspiring feel.

Popular questions about 2023 Subaru Impreza control arms

How long do the control arm bushes last?
On typical Aussie and New Zealand roads, many owners see 80,000–120,000 km from front lower control arm bushes, but heavy city commuting, rough surfaces, or big potholes can shorten that. Inspect at each service and replace at the first sign of cracking, leaking (for hydro-bushes), or excess movement.

Do I need an alignment after replacing control arms?
Yes. Any time a control arm, bush, or ball joint is replaced, the wheel alignment will shift. A proper four-wheel alignment restores camber, caster, and toe so tyres wear evenly and the Impreza tracks straight.

What are the symptoms of a failing control arm or ball joint?
Owners often notice clunks over bumps, vague steering on the motorway, pulling under braking, or saw-tooth/uneven tyre wear. A visual check may show torn boots, leaking bushes, or rust around joints—any of which warrants attention.