I need to know, before I ask Good evening, how many oxygen sensors does my 2004 Dodge Durango Limited Edition w/hemi 8 cyclinder 4wd 5.7 engine

SOURCE: 2004 Durango 5.7 timing gear alignment

1. If tensioner assembly is being replaced, install tensioner and mounting bolts. Torque bolts to 28 Nm (250 in. lbs.) .
2. Retract tensioner if required. CAUTION: The camshaft pin and the slot in the cam sprocket must be clocked at 12:00. The crankshaft keyway must be clocked at 2:00. The crankshaft sprocket must be installed so that the dots and or paint marking is at 6:00.
3. Place both camshaft sprocket and crankshaft sprocket on the bench with timing marks on exact imaginary center line through both camshaft and crankshaft bores.

SOURCE: oxygen sensors in a 2004 dodge ram 1500 4x4

im not for sue how many but u need to take it to autozone if u have one where u live they will tell u where it is the most comon one if u have straight eguast is the one right in front of the cats if its that one u should notice a stall out every time u fill up from below empty on ur gauge

SOURCE: Location of oxygen sensor on 2004 dodge dakota

One of them is located on the driver's side of the motor and connects to the exaust manifold.

Harvey N Tawatao

• 3854 Answers
• Posted on May 29, 2009

SOURCE: location of oxygen sensor

I believe you may have three (3) O2 sensor, (2) of the sensor is on ether side of the exhaust down pipe and some times called up stream O2 sensor, the third O2 sensor know to some as the down stream O2 and is after the Catalytic converter.
The up stream O2 monitors the left and right side banks and sends signals to the ECM to make the adjustments to the injectors to keep the proper air/fuel ratio. 
The down stream O2 monitors the catalytic converter and sends signal to the ECM if the catalytic converter has gone bad.
Good luck and hope this helps. If you get it scanned at Auto Zone, they should be able to let you know which O2 has gone bad so as to not change all three. You could always check the wire harness to the down stream O2 for corrosion. Keep me posted

SOURCE: location of oxygen sensor for 2000 dodge durango

There are 2. One is located above the catalytic converter most likely near the exhaust manifold where it attaches to the head. the second and most common one I have found to go bad is the down flow sensor located after the catalytic converter before the muffler on the underside.