The first set of 4 I ordered through the Revain Warehouse. I have two different versions of this sensor, one that looks like the image on this product page and the other where the sensor was smaller although the length was the same. I took them all to Discount Tire to install on my 2009 Camry. Three of them seem to have been reprogrammed with the same code, so I couldn't use them together. One didn't work at all. So I ordered another set of 3, brand new this time. All 3 of this set looked like a smaller version from the first batch, not like the picture on the product page. I took 1 from the first set and 3 from the second set and luckily they all had different codes. Unfortunately, Discount Tire said they were "too long" for my car and could not be fitted. Not sure if I have old stock or if Discount Tire is just trying to get me to buy my own sensor that costs twice as much. a lot of. In the end I returned them all. There's something on my neighboring world that costs about the same as this product, so I'm going to craft it there. Should have checked there first and saved myself all the hassle.