Does anyone know where I can get a Honda 4 wire o2 sensor? New or used. Parts stores around don't know what I'm talking about.

 

Your local shops dont know what a o2 sensor is? WTF? Okay, you need to find a Pepboys or some other large chain store and ask them for a Bosch universal o2 sensor. They work great and are alot cheaper than OEM.

However, if you're Mr. Moneybags the you should go with a OEM Honda o2 sensor. They cost alot but it'll be plug and play.