I have EFX, had them in for 2 weeks and one side burnt out. They sent me a replacement after that (just 1 side) installed them and now today I got an error code but then it went away. My honest opinion is that they are not built well, when its hot outside and the engine bay heats up, they start to malfunction. Funny thing is I dont even run them as DRLs and still codes pop up. If one side goes out again, I will just put them up for sale and run my GP thunders until a better solution comes to market. I hate buying parts for expensive cars that don't work properly and give headaches, worst ever
