UPDATE failed today! 10/30/20 took less than 3 months. They worked great on my 2008 Escalade. I checked what is required before installing. We have been working for 3 months now. The pairing did not require any special tools but was done manually by adding/removing air. ****TIP*** I used a garden sprayer to test. I tossed them to him, pumped them up and tied them to the car.