Flushing your Power Steering Fluid should be done every 50,000 miles. Front wheel drive vehicle should use this advice. Front wheel drive vehicles have rack-n-pinions and it's important to keep clean Power Steering Fluid in your vehicle to get the longest life of your Power Steering Pump and or Rack-n-Pinion. When servicing your vehicle such as an oil change be sure to have them check your Power Steering Fluid Level and the color.