My mechanic couldn't believe the price I bought them for (yes I have a good mechanic who has no problem ordering my own parts). He used to reprogram them with his expensive snap-on scanner. They were easy to install with no programming. And with all his suppliers, he cannot buy a single brand at this price. He wants me to order for him! There have been no problems since installation. The light went out after driving two or three miles and would not go out. The batteries in each of these sensors are not replaceable and wear out after a maximum of 6 or 7 years. So if one sensor is faulty, it makes sense to only replace all four, otherwise the indicator will light up again after a month. Totally pain free for the price. 5 Stars!