Where is the Upstream Oxygen Sensor located on my 2003 Buick Regal LS? -Directly down the center of the car, behind the engine block. Watch the video for the…
Where is the Upstream Oxygen Sensor located on my 2003 Buick Regal LS? -Directly down the center of the car, behind the engine block. Watch the video for the…
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How do I change it?
It’s very simple. With the engine cold, using a socket or wrench, simply
loosen the sensor. The part to loosen is the closest part to the exhaust
line, its a hex for your your wrench to grab onto to. Then remove sensor,
unhook the connector and reinstall the new one. Be careful not to touch the
end of the new sensor as well.