power steering fluid change on 2006 Toyota Corolla

Is it necessary to do this and how often should I do it?
Thanks, CMJ

Asked by for the 2006 Toyota Corolla
Flushing power steering fluid should be done if the fluid is exceptionally discolored, power steering components are changed or steering difficulties are experienced.
As a maintainence item the fluid should be flushed every 30,000 miles for long term durability of steering components but manufacturers generally don't require doing it. Its up to the customer and there long term desires for the car. Generally not seen as a must do service item.