I have a 2008 STS4 with FE3/F55 suspension. The car has 96k miles. In the last few months I have had one rear shock seize, the other rear shock started leaking oil and lost it's dampening ability. Now the right front shock is starting to seize. Do these shocks/struts have a history of failure at less than 100k miles. It troubles me that they all went bad within a few thousand miles of each other.