I need a new oil pressure sensor (it was broke on the engine I just bought (94)) and I don't know what would be the place to buy it.
Autozone has it but they have one with 1/8" X 27 threads
and one with 1/4" X 18 threads. Which one do I need? Their price is $23... is it a good price?
Thanks.

 

I went to carquest and they didnt ask me what thread it was, but it looked pretty fine. I think I paid 30$.