The 2003 Ford Explorer typically has four ABS (Anti-lock Braking System) sensors, one for each wheel. These sensors work together to monitor wheel speed and help prevent wheel lock-up during braking. This setup is standard for most vehicles equipped with ABS to ensure optimal braking performance.
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 )
The 2003 Ford Explorer has 12 valves.
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On a 1995 Ford Explorer : There are ( 2 ) oxygen sensors ( I believe there is one sensor in the outlet of each exhaust manifold )
there are 4 o2 sensors
how many o2 sensors on a ford e350 van 2003
My Chilton repair manual - engine wiring schematic shows ( 2 ) heated oxygen sensors for the 1993 Ford Explorer
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( 16.8 gallons ) in the 2003 Ford Explorer Sport
In a 2003 Ford Explorer : The gas tank size is ( 85.2 liters ) if that is what you are asking
My 1995 Ford Explorer with 4.0 L OHV has 2 oxygen sensors (Helpfull)