The cheaper one does not come with the plug, you will have to take the old plug off and solder it to the new sensor. Be careful as the old plug is easy to crack removing it as the plastic deteriorates with age and looses flexibility. I personally would buy the new oem style. Also there are some cheap ones on Ebay. I bought an original toyota sensor NIB for $47.00. Here it is $200.00 at the dealer.