Lexus · Canada · Crit
Lexus Is 350, GS 350 +5 more: Engine
Affects Lexus Is 350, GS 350, LS 460L, GS 450h, LS 460, GS 460, LS 600HL · 2006–2008 — about 4K vehicles.
The hazard
On certain vehicles, the material composition of the engine valve springs may include micro-foreign objects, which may compromise the strength of the valve spring, causing the spring to degrade and break. If a valve springs breaks, abnormal noise and rough engine performance will be noticed and, in the worst case, the engine could fail and stop suddenly while the vehicle is in motion. A sudden engine failure would result in lost propulsion which, in conjunction with traffic, road conditions, and driver's reactions, could increase the risk of a crash causing property damage, personal injury or death. Correction: Dealers will install new valve springs.
What to do
Contact your dealer; the remedy details were not included in the filing.