Parts for your 2009 Lexus Is-Struts

2009 Lexus IS — Struts or not?

Short answer: struts aren’t used on the 2009 Lexus IS. This generation (XE20, IS 250/350/IS F, including AWD and IS C) runs a double‑wishbone front suspension and a multi‑link rear, both with separate shock absorbers rather than MacPherson struts. In a strut setup the damper is a structural member guiding the wheel, in the IS, the control arms do the locating and the damper’s job is strictly to control spring motion.

Why no struts? Lexus chose the wishbone layout for sharper camber control in corners, a lower bonnet line, and more precise steering feel. With upper and lower arms managing geometry, the shock isn’t load‑bearing, so it’s correctly called a shock absorber (or damper), not a strut. Parts catalogues and some workshops may say “struts” out of habit, but Lexus service literature lists “Shock Absorber Assembly (Front)” and “Rear Shock Absorber” for this model.

What should an owner do if they were hunting for “struts”? Think in terms of shocks and mounts:

• Inspect for oil seepage on the shock body, uneven tyre wear, knocking over bumps, excess bounce, nose‑dive under braking, or a floaty feel on the motorway.
• Typical replacement is every 80–120,000 km depending on road conditions, age, and load. Always replace in axle pairs.
• Front: coil‑over shock assemblies, use a quality spring compressor if rebuilding. Rear: separate shocks and springs, replacement is usually quicker.
• Torque suspension bolts at normal ride height and get a wheel alignment after the job. Geometry is controlled by the arms, but toe can shift when components are disturbed.
• Stick with reputable brands or OEM to maintain ride quality and braking stability.

Technical sources referenced: Lexus/Toyota TIS Repair Manual for 2006–2013 IS (Front Suspension: Double Wishbone Type, Rear: Multi‑link, components named “Shock Absorber”), Lexus New Car Features (NCF) for XE20 chassis describing double‑wishbone front and multi‑link rear, and industry manuals such as Haynes/Autodata noting shocks rather than struts on this model.

FAQs

Does a 2009 Lexus IS have struts or shocks?
It has shocks. The front is double wishbone and the rear is multi‑link, so the dampers aren’t structural struts. Lexus service docs list them as shock absorbers.

When should the shocks be replaced?
There’s no fixed interval, but many owners see best results replacing between 80–120,000 km. Go by condition: leaks, knocking, poor control, or uneven tyre wear mean it’s time.

Do I need a wheel alignment after replacing shocks?
It’s a good idea. While the arms set camber and caster, toe can change when components are disturbed. An alignment helps protect tyres and keeps the IS tracking straight.