Assuming you are only talking Ford Explorer SUV's and not Sport Tracs...
1991 - 1994:
-Was boxy-like
-Front grill was square
-Leather interior was rare, mostly cloth
-Chrome bumpers (Except for the 1994 Limited)
-Limited and some Eddie Bauer had side-step
-Available Models were
-Rectangular Fog Lamps
1995 - 2001:
-First major redesign
-Box-like grill was replaced with a rounded Ford grill assembly, very easy to spot
-Design was more rounded off, or "curvy"
-Leather interior more common
-Rectangular Fox Lamps
2002 - 2005:
-Began to look more like a Ford Expedition (Almost identical smaller version of it)
-Grill was mesh-like, with the blue Ford Oval in the middle
-Most likely leather interior
-Rounded Fog Lamps towards the middle of the truck, rather than on the outside edges of the bumper as in previous models
2006 - Now
-Box-like fog lamps
-Unique headlights, square with a slight dash for styling
-Modern design, very distinguishable.
Ford started manufacturing the Explorer in 1990 as a 1991 model
Any particular MODEL YEAR of Ford Explorer
Starting with the 1995 model year of the Ford Explorer the AUTOMATIC transmission was ELECTRONICALLY controlled ( so the answer would be no )
www.everdrive.com will tell you
The last model year for the Ford Explorer Sport Trac was ( 2010 )
There were no Ford Explorers in 1989 - the first model year of the Explorer was 1991.
1991
That would depend on what year of Ford Explorer and which engine you have ( my 1995 Ford Explorer with the 4.0 liter OHV , V6 engine has ( 2 oxygen sensors )
Starting with the 1995 model year of the Ford Explorer : ( power RACK AND PINION steering )
I believe it was in 1995 when Ford came out with what is referred to as the second generation of the Explorer (Helpfull)
( No ) starting with the 1995 model year of the Ford Explorer the automatic transmissions were electronically controlled
No , 3rd row seating was available in the Ford Explorer starting with the 2002 model year