Bank 1 is the passenger side of your engine
Sensor 2 is in the exhaust after it passes through the catalytic converter ( downstream )
On a 1997 Mercury Mountaineer ( V6 and V8 ) Bank 2 is the drivers side of the engine
Try replacing the upstream O2 sensor
how to change spark plugs on a 97 mercury mountaineer
Where is the spare tire
you need to change your thermostat
Oil pan.
On a 1997 Mercury Mountaineer : The fuel pump shut off switch ( inertia switch ) is in the front passenger footwell , by ( or behind ) the kick panel
bearning on front breaks burn out
The electric fuel pump is inside the fuel tank
79 liters or 20.86 gallons.
SAE 5 W 30 - certified for gasoline engines
Standard 2 Piece Harness Up To Late 1990