I have two different steel wheels on my 06 Tacoma. The spare is a plane steel and the other 4 a styled steel. The spare has 20 deg and the other 4 have 40 deg. Sensor. I had a problem with one of my sensors. It reads 14 lb when the tire has 35 lb in it. I took it to Smithtown Toyota on long island NY. First they told me I only had 14 lbs of air in the tire. I checked it before it went in and it had 35lbs. then they told me someone changed the tires because Toyotas don’t come with firestone tires. The date code on the tire is Oct 05 and the truck was built Nov 05. When they checked the sensor they said it wasn’t covered by the warranty. They said that the sensor was damaged. It would cost $396 to change it. Then they said the good news is that there is a service bulletin on my tires and I would get new tires. I told them that I didn’t want to fix the sensor. So now they don’t want to do the tires. I asked why the sensor is so much when it retails for $112 and takes ½ hr to install and program. They told me it takes 3 hrs. They charged me $102 for a diagnostic charge on my in warranty truck. They said the tire was losing air. Said I must have picked up a nail. They replaced the one tire with the bad sensor. When I went behind the shop to get my truck I saw my old tire sitting there. They ripped the bead on the tire taking it off the rim to check the sensor. There was no nail in it. I think there should be a class action suit on these sensors. Only Toyota dealers can service your wheels and program these sensors. Other car companies have sensors that any auto shop can service. I still have the flashing light on my dash.