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2003 Saturn vue 4 cylinder O2 Sensors: The oxygen sensor that is refered to as bank 1 sensor 1 is located on the drivers side of the exhaust manifold, you can see it if you look directly down from above the rear of the motor... looks like a spark plug with wires coming out of it... lol.

If you cannot use a wrench (usually 19mm). You need a special 02 sensor socket (parts store <-$20 ) to remove it. You might hav trouble seeing it at first because it's pointing towards drivers side, on the side. It is not where they usually are. Be sure to use a speck of anti-seize on the threads only. Do NOT TOUCH the part that faces in.

The oxygen sensor that is bank 1 - sensor 2 is located right after the converter. It is easy to find and replace. use 19mm wrench or sensor socket...

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Q: Where is the O2 sensor on a 2003 Saturn Vue 4 cylinder?
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