Hey whats up guys. I initially purchased a few units, 1 quad from ivan and 2 duals from elvis. Now I had my quad initialy installed on my aston martin and all was working well. However after a few weeks I started getting the sun interference at night and it kept on telling me that sensor 3 was no good. Sometimes it would tell me all are ok, sometimes about 90% sensor 3 was bad. Anyways I sold the car and took out the quad unit however still had 1 new dual unit here from elvis since i sold the other one. Anyways the new installer used elvis new box, 2 jammers and 2 jammers from ivan completing a quad set with no issues at startup. Now it seems to be talking about sun interference again at nighttime all the time but no issues with dead sensors, I dont think. When it powers up it says welcome, the sensors never beep even if your in front of them and ten 10 seconds later it tells so parking sensor disabled. So now I had the original unit, and 3 heads and I would like to get them working. Since I dont have a neccesity for them now I was wondering if I can just package them up, send them back to you ivan and have you take a look at them. Maybe you can just reflash the firmware and also fix the broken sensor? Thanks again guys and I hope you hold up to the warranty information.