I want to change the O2 sensor in my 1999 dodge

No...not hard to do.....if you have the right tool.

Hope this helps!


Sensor sockets, like this one from Lisle®, are slotted on one side to accommodate wiring


Most models have O2 sensors to monitor emissions before and after the catalytic converter

Removal & Installation
WARNING NEVER apply any type of grease to the O2 sensor electrical connector or attempt any soldering of the wiring harness. This will influence the sensors operation.

1. Disconnect the negative battery cable.
   
2. Raise and support the vehicle.
   

CAUTION The exhaust pipe gets extremely hot during engine operation, and if touched, severe burns can occur. If servicing the oxygen sensor, avoid contacting the exhaust system.

1. Disconnect the wiring harness from the oxygen sensor.
   
2. Remove the sensor using the appropriate tool.
   

NOTE The oxygen sensor threads are coated with an anti-seize compound. The compound must be removed from the mounting boss threads, either in the exhaust manifold or Y-pipe. An 18mm x 1.5 x 6E tap is required.


To install:

1. Clean the threads of the mount to remove any old anti-seize compound.
   
2. If the old sensor is to be reused, apply anti-seize compound to its threads. New sensors come with the compound already applied.
   
3. Install and tighten the sensor to 22 ft. lbs. (30 Nm). Connect the wiring harness.
   
4. Lower the vehicle.
   
5. Connect the negative battery cable.