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The 2003 Ford Explorer requires Mercon 5 Full Synthetic Power Steering Fluid. Even though power steering fluid is not typically considered a high maintenance aspect, it plays an essential role in your vehicle's steering system. The cost of a power steering flush ranges from $100 to $130. Opinions differ on how frequently power steering fluid should be changed, but the general agreement is approximately every two years or every 75,000 to 100,000 miles. If your system is low on fluid, air will circulate through the steering mechanism, leading to squealing noises when turning the wheel, indicating a need for a fluid replacement.
In the Ford Explorer from 2003, the power steering fluid is actually the same as Mercon 5 transmission fluid.
The 2003 Ford Explorer requires synthetic power steering fluid.