LEXUS GS450h, LS460, GS460, LS600hL
What the hazard is
Excessive stress may be applied to certain points of the valve spring which may lead to the development of a crack, and then potential breakage.
What to do
Toyota will contact all owners of affected vehicle by phone to explain the concern and to discuss the repair process and timing. All owners will also receive a Recall Notification Letter.
Defect
The valve spring material may not have sufficient strength.