Bank 1 is the passenger side of the engine in your Mercury Mountaineer ( V6 and V8 ) and bank 2
is the drivers side of the engine
V6 firewall 3 - 6 2 - 5 1 - 4 front of Mercury Mountaineer V8 firewall 4 - 8 3 - 7 2 - 6 1 - 5 front of Mercury Mountaineer
Passenger ===================================================== Actually , bank 2 is the drivers side of the engine in a Mercury Mountaineer
Bank 2 is the drivers side of the engine in your Mercury Mountaineer Sensor 2 is in the exhaust after the catalytic converter
Bank 2 is the drivers side of the engine in your Mercury Mountaineer Sensor 1 is between the engine and the catalytic converter ( upstream ) Sensor 2 is after the catalytic converter ( downstream )
Bank 1 is the passenger side of the engine and bank 2 is the drivers side of the engine on your 1997 Mercury Mountaineer 5.0 liter V8 engine
The oxygen sensor for bank 1 sensor 1 for a 2000 mercury mountaineer is on the cylinder #1 side.
Bank 2 is the drivers side of the engine in a 2002 Mercury Mountaineer Sensor 2 is after the catalytic converter ( downstream )
On a 1997 Mercury Mountaineer ( V6 and V8 ) Bank 2 is the drivers side of the engine
The passenger side of the motor is bank 1
Bank 2 is the drivers side of the engine in a Mercury Mountaineer Sensor 2 is in the exhaust after the catalytic converter ( downstream )
Bank 2 is the drivers side of the engine in your Mercury Mountaineer ( V6 + V8 ) Sensor 1 is in the exhaust close to the engine before the exhaust enters the catalytic converter
Bank 1 is the passenger side of the engine in your Mercury Mountaineer Sensor 1 would be close to the engine before the exhaust enters the catalytic converter ( upstream sensor )