The upstream sensor is located on the exhaust manifold, front of the engine easily accessible from the top.
The downstream sensor is after the catalytic converter, on the exhaust, underneath the car. The connector is next to the oil filter.
There are two.
1999-2002 Villager or Nissan Quest.
On a 2000 Mercury Villager, the oxygen sensors are located in the exhaust system. There are typically two sensors: one located before the catalytic converter (upstream) and another after it (downstream). To access them, you'll need to look under the vehicle or potentially remove some components for better visibility. It's advisable to consult a repair manual for detailed locations and procedures.
The TPS is located on the back side of the throttle body. Like all other sensors on the Villager, hard to see, almost impossible to get at to replace. I would suggest obtaining a repair manual at your local parts store.
It is located inside the fuel tank.
Everywhere.
In the cylinder head .
In the engine compartment
In the fuel tank
It's on the throttle body.
The thermostat at the engine in a 2000 Mercury Villager is located Êon the right passenger side near the middle. You should look for the jiggle valve on the thermostat that should be facing up.
they are located in the exhaust system Where ? how many 02 sensors on a 2003 Pontiac Montana