Parts for your 2020 Subaru Impreza-Suspension bushes

2020 Subaru Impreza suspension bushes — what they do and when to replace them

Suspension bushes are absolutely fitted to the 2020 Subaru Impreza. Subaru’s Factory Service Manual for the GK/GT platform and OEM parts catalogues list multiple rubber–metal bushes across the car: front lower control arm bushes, front and rear stabiliser (sway) bar D‑bushes, rear lateral link and trailing arm bushes, and rear subframe bushes. They’re a core part of the Impreza’s MacPherson‑strut front and double‑wishbone rear suspension.

On this model, the bushes isolate noise and vibration, keep alignment steady under load, and allow the arms and links to articulate smoothly. Good bushes mean the Impreza steers straight, brakes confidently, and rides quietly. Worn bushes can let the wheel alignment wander, chew out tyres, and add harshness.

As part of routine servicing, it’s smart to inspect the bushes every 10,000–15,000 km or at each oil service. Look for perished rubber, cracking, splitting, or oil contamination (engine oil and coolant accelerate rubber breakdown). Lever the arms gently to check for excess movement, and listen for clunks over speed humps. Typical lifespan is 80,000–150,000 km depending on climate, road conditions, and driving style.

• Common signs of worn bushes: steering shimmy or tramlining, clunks over bumps, vague turn‑in, uneven or accelerated tyre wear, and instability under braking.
• Service tips: avoid solvent‑based sprays on rubber, use silicone‑safe products if needed. After any bush replacement, book a full four‑wheel alignment to reset camber, caster and toe.

When replacement is due, quality OEM rubber bushes keep factory comfort and NVH, while polyurethane upgrades can sharpen response at the cost of more road feel and potential squeaks if not greased correctly. Many front bushes are available as part of complete control arm assemblies, which can save labour and include fresh ball joints. Always torque fasteners with the vehicle at normal ride height to avoid pre‑loading the new bushes, and replace any single‑use (torque‑to‑yield) bolts or nuts as specified. In coastal or high‑heat environments, expect shorter service life and plan inspections accordingly.

For roadworthy/WOF checks, technicians will fail bushes that are cracked, separated, or excessively soft. Staying on top of them keeps the Impreza tracking true, preserves tyres, and maintains that planted Subaru feel on Aussie and Kiwi roads.

FAQs

How long do suspension bushes last on a 2020 Subaru Impreza?
Most owners see 80,000–150,000 km, but harsh roads, heat, and fluid leaks can shorten that. City kerbs, speed humps, and gravel also accelerate wear. Inspect at each service and before long road trips.

Should the Impreza use polyurethane bushes instead of rubber?
Polyurethane can sharpen steering and reduce roll compliance, great for spirited driving. Expect a firmer ride and potentially more NVH. Daily drivers usually prefer OEM‑style rubber for comfort and quiet.

Do new bushes need a wheel alignment?
Yes. Any change to control arms or bush positions alters geometry. A post‑repair alignment restores even tyre wear and proper handling.