On a Ford Expedition : Bank 1 is the passenger side of the V8 engines
In a Ford Expedition : Bank 1 is the passenger side of the 4.6 and 5.4 liter V8 engines
On a Ford Expedition ( 4.6 and 5.4 litre V8 engines ) Bank 1 is the passenger side of the engine
On a 2000 Ford Expedition , 4.6 or 5.4 liter V8 engines : Bank 1 is the passenger side of the engine and Bank 2 is the drivers side
On a 2000 Ford Windstar ( 3.0 L and 3.8 L , V6 engines ) firewall 1-----2-----3 ( bank 1 ) 4-----5-----6 ( bank 2 ) front of vehicle > driver
On a 1999 Ford E-150 : For the GASOLINE engines ( V6 , V8 ,, V10 ) Bank 1 is the passenger side of the engine and bank 2 is the drivers side
On a 2000 Ford Windstar ( 3.8 L and 3.0 L , V6 engines ) firewall 1-----2-----3 ( bank 1 ) 4-----5-----6 ( bank 2 ) front of vehicle > driver
In a Ford Explorer ( V6 and V8 engines ) Bank 2 is the DRIVERS side of the engine
On a Ford Expedition , Ford F-150 : Bank 2 is the drivers side of the engine ( V8 and in the case of the Ford f-150 V6 engines )
On a 2002 Ford E-150 : Bank 1 is the passenger side of the engine ( V6 and V8 engines ) Sensor 1 would be close to the engine BEFORE the exhaust enters the catalytic converter ( upstream sensor )
On a 2002 Ford F-150 ( 4.2 liter V6 / 4.6 and 5.4 liter V8 engines ) Bank 1 is the passenger side of the engine Sensor 1 is close to the engine BEFORE the exhaust enters the catalytic converter
Bank 1 is the passenger side of the engine in your 1997 Ford Explorer ( V6 engines and V8 engine ) Sensor 1 is before ( upstream ) the exhaust enters the catalytic converter Sensor 2 is after ( downstream ) the exhaust leaves the catalytic converter