The Oxygen Sensor or O2 senser, as it is sometimes called, is screwed into the exhaust manifold close to where it joins the exhaust pipe. You must jack the car or put it on a rack and get to it from under the car. If you are replacing it yourself you will need a crow's foot wrench.
Somewhere on the exhaust system. LOOK
the oxygen sensor is located in/on the exhaust manifold.it looks like a spark plug with a wire coming out of the top
It has both.
On the trans.
"http://wiki.answers.com/Q/Where_is_the_crank_sensor_on_a_1990_2.5_buick_skylark"
will the fenders from a 1971 Buick Skylark Custom fit a 1972 Buick Skylark?
Buick Skylark was created in 1953.
Oxygen SensorOxygen Sensor Location
The 1990 Buick LeSabre oxygen sensor is located on the outside of the air cleaner housing. The oxygen sensor will be on the back side of the housing.
the O2 sensor is in the exhaust manifold leftside of engine (front) between engine block and engine cooling fan. Easy access. I used a 7/16.
REar side of radiator approx. 1/3 from the top
It's on the driver's side of the rear cylinder head.