I paid about $40 ea.for my '93 and over $60 for my '94 (different model sensor with longer leads). It's easy to change, just unscrew sensor from the header/downpipe (varies with model) using an open wrench. New ones come with a little anti-sieze paste already on the threads, so be very careful not to smear it on the sensor tip. Other end of lead is a plastic connector, again location varies a bit with model. On my '93 for example the driver's side connection was high up just below the valve cover. Best to put the car on ramps or stands, so your arms have plenty of room.