There are four oxygen sensors. Two are pre-catalyst and two are post-catalyst oxygen sensors. Basically, there is one sensor for each side of the engine in front of the catalytic converter and there are two sensors behind the catalytic converter.
There are 2 upstream 02 sensors just behind the exhaust manifolds, threaded into the exhaust pipes, one on each side. There are 2 downstream 02 sensors just behind the catalytic converters, one on each side as well.
"transmission fluid leaking from fitting below radiator cap after replacing radiator on 99 surburban
You can't. the computer will not function properly with out working oxygen sensors.
Cant illegal and the engine wont run without them
There are two oxegen sensors on the 99 V70 GLT.
only one
4
I have a 99 millenia myself and it has 4 (four) 02 sensors, and each go for around 200-450 in price. I don't really know where they are located though, but i do know they can cause your check engine light to come on and flash from time to time, as well as the car hesitating and feeling like it is going to stall.
2
Check
Actually, there are two O2 sensors. One upstream on the exhaust manifold and one downstream at the catalytic converter. Either should be tested before shot-in-the-dark replacement.
Should be two front and rear of engine