I received the set on time from the seller. there are no problems. There are 4 sensors included, one for each wheel, no problem. The price was great, there were no problems. In order to remove the old ones it was necessary to remove the rotor, the hammer and the tool used to shape the stones. Installation was easy. However, it did not fix my ABS light or my traction control dash. I give a low rating to the person I sold my MK4 GTI to who said they replaced all 4 sensors again and the problem was solved. I can only assume that one or more of these sensors were defective.