Ford recommends using power steering fluid that meets Ford specification WSS-M2C204-D (the latest revision used on most modern models). In practice, this means Ford Power Steering Fluid or a universal PSF that explicitly states compatibility with that Ford standard. Always check your owner's manual for the exact requirement for your vehicle's model year and market.
Key specification and compatibility
Ford's service literature and owner guides designate a specific PSF standard designed to protect the hydraulic steering system’s seals and pump. The current widely cited standard is WSS-M2C204-D, with newer Ford literature referring to the latest revision of the M2C204 family. If your vehicle manual specifies a different revision, follow that instruction, but do not substitute other fluids unless explicitly approved.
Model-year and regional variations
While the core guidance is consistent, the exact PSF requirement can vary by model year, region, and whether the vehicle uses hydraulic power steering or electric assist. For example, some older Ford models may reference different guidance, while newer vehicles use the M2C204 family. Always verify on a case-by-case basis.
What to look for on the label or product sheet:
- Power steering fluid that explicitly states compatibility with Ford WSS-M2C204-D (or the latest revision in the M2C204 family).
- Ensure the product is labeled as power steering fluid, not transmission fluid, engine oil, or other hydraulic fluids.
- Avoid mixing PSF with ATF unless the manual allows it; if you have a mixed fill situation, consider a complete system flush according to Ford recommendations.
The bottom line is that for most Ford vehicles you should use Ford Power Steering Fluid or a universal PSF that specifically lists compatibility with WSS-M2C204-D. If in doubt, consult your dealer or a qualified technician.
What Ford recommends in practice
In practice, Ford’s current guidance emphasizes using PSF that meets WSS-M2C204-D. The fluid helps maintain precise steering feel, keeps seals in good condition, and prevents pump wear. Many aftermarket PSFs advertise compatibility with WSS-M2C204-D, but you should verify the product sheet, include the specification, and avoid generic ATF unless the manual allows it.
Consulting the owner's manual is the safest route. If you can't locate the PSF specification there, call a Ford dealership for confirmation. The wrong PSF can cause noises, stiff steering, or leaks over time.
Summary
Ford generally requires power steering fluid that meets WSS-M2C204-D (the M2C204 family), with the recommended option being Ford Power Steering Fluid or a universal PSF explicitly certified to that standard. Always refer to the owner’s manual for your specific vehicle and region, and avoid mixing fluids unless explicitly approved by Ford.