Parts for your 2020 Lexus Is-Struts

2020 Lexus IS — Are struts used on this model?

Short answer: no, the 2020 Lexus IS does not use MacPherson struts. Technical sources specify a double wishbone front suspension and a multi‑link rear, both using shock absorbers (dampers), not load‑bearing struts. This is documented in Lexus IS (XE30) New Car Features – Suspension, the Toyota/Lexus TIS Repair Manual for 2017–2020 IS (sections “Front Shock Absorber Assembly” and “Rear Shock Absorber”), and the Lexus Electronic Parts Catalogue, which lists these components as shock absorbers rather than struts. In a MacPherson layout the strut locates the steering knuckle, on the IS, the upper and lower control arms do that job, so the damper is not a structural strut.

Why doesn’t the 2020 IS use struts? Lexus chose the double wishbone front for precise wheel control and handling feel befitting a sport‑luxury sedan. That architecture lets engineers dial in camber gain through the stroke for sharper turn‑in without the geometry compromises typical of MacPherson systems. It also packages neatly for a low bonnet line and better weight distribution, and helps isolate noise and vibration for the cabin.

• Handling first: double wishbone geometry maintains a more consistent tyre contact patch during cornering, boosting grip and steering accuracy.
• Packaging and refinement: separating wheel location (control arms) from damping duties (shock) reduces harshness and allows a sleeker front end.
• Model intent: across IS grades, including F Sport, this setup supports the nameplate’s performance brief, where fitted, AVS (Adaptive Variable Suspension) uses electronically controlled shock absorbers within the same architecture.

It’s worth noting some workshops casually label any coil‑over damper a “strut”, but on the 2020 IS the correct parts are front and rear shock absorbers and their mounts. Owners should ensure the right components are ordered by VIN, especially on AVS‑equipped cars which require the specific electronically controlled dampers. After any damper replacement, a wheel alignment is good practice, and technicians should torque suspension fasteners at normal ride height to avoid bush preload. Routine servicing should include a check for oil seepage, worn mounts or knocking over bumps, many shocks remain serviceable well past 100,000 km, but local road conditions and load carry habits can shorten that.

FAQs

Does a 2020 Lexus IS have struts or shocks?
It has shocks, not struts. The front is a double wishbone and the rear is multi‑link, so the shock absorbers handle damping while control arms locate the wheel. Lexus service literature and the parts catalogue list these as shock absorber assemblies rather than struts.

When should the shocks be replaced on a 2020 Lexus IS?
There’s no fixed interval. Replace when there’s oil leakage, excessive bounce, knocking, uneven tyre wear, or a decline in ride and body control. Many owners reassess shocks around 80,000–150,000 km or 7–10 years, depending on road quality and use. Always inspect mounts and bushings at the same time and align the wheels after replacement.

Can an F Sport (AVS) 2020 IS use non‑AVS shocks?
Mixing AVS and non‑AVS isn’t recommended. AVS cars need the correct electronically controlled dampers, fitting non‑AVS units can log faults and alter drive‑mode behaviour. Best practice is like‑for‑like replacement using the right part numbers for the vehicle’s build.