As in title, im putting an oil pressure gauge in my car and wanted to know what the size of the thread is? Its a fabia vrs 2004, thanks

they are normally M10x1 on most late vw engines, there is actually a oem part you can get which has a pressure sensor and the oil pressure switch in the same unit which means you dont need a t piece to fit it all together

do you know how much it is for the oem and wheres the best place to get it from? cheers