The easiest simplist way is to go to advance auto parts have them find one in there system.
if you want to do it the anal way you must go through Ford, pay much more for less. They will find the proper o e m pump for your year, make, and model.
No steering power or brake power ford explorer 1999?
According to the 2000 Ford Explorer Owner Guide : ( Motorcraft MERCON automatic transmission fluid is used as the power steering fluid )
Starting with the 1995 model year of the Ford Explorer : ( power RACK AND PINION steering )
NO ! ( My Ford Explorer uses automatic transmission fluid as the power steering fluid )
According to the 2006 Ford Explorer Owner Guide : ( Motorcraft MERCON automatic transmission fluid is used as the power steering fluid )
Try under the steering wheel
To the power steering pump located on the driver's side of the engine.
That's the accessory drive belt at the front of the engine for your power steering , air conditioning compressor , alternator etc.
The fuse for your 2002 Ford Explorer Sport is similar to that of the 2001 Ford Explorer Sport.
Ball joints.
I'm not a mechanic / technician , but as far as I know the power steering doesn't have a filter
If this is the 4.0 L - OHV engine , it's on the drivers side of the engine below the power steering pump