After talking to Sewell and my local dealership. I figured out the part number (83420-30020) for the coolant temp sensor/sending unit that sends its signal to the gauge cluster.

Now my question is.....what does the plug look like? (i no longer have my stock engine/harness so i cant look at it).

Does anyone have a picture of the plug that goes into the sensor/sending unit?

I will upload some pictures of the sensor/sending unit that i am talking about shortly.

 

saved for pictures

 

it looks like this

 

^^^^^that is for the fan switch i thought. not for the gauge cluster.

 

sorry thought it was the same ones

 

all figured out. went to lexus and used their service manuals.

 

If you are looking for the sensor that the gauge takes its readings from, it is called the "sender gauge" or the "coolant sender gauge". It has just 1 pin on the connector plug. Not 2 pins on the plug like the typical coolant temperature sensor. You can type "gs300 coolant sender gauge" on ebay and they are around 13$ each.