Outer Limits 4x4 Board

Can anyone advise me on oil pressure senders?
I am replacing the sender for my guage ($100! from repco!)
Anyway, it looks like the original sender is next to one of the oil filters.(hope thats right) The repco part has two wires coming from it to a plug. My original part has these two wires plus another larger wire going to another small unit under the air filter housing.
Seems like I have the wrong part but there was only two listed, one for the oil presure light only and one for the guage.
Can anyone help?
cheeeers.........................again!

mate i have a oil prssure sender the orginal one for a TB42 for sale.

PM if ur interested . works as well took it off for a aftermarket gauge.

Rick.

it should have a plug with two wires on it.the one you have must be from a later model,go to nissan mine wasn't over $80.00

one is for your guage the other is for the oil light.

Thanks for the input, I returned the repco part today.
The repco part had two wires wheras my original part has three, one going to the unit under the Air cleaner.
Oh well, at least I saved myself $100!