Hi, I'm new on this forum and I'd like to ask an question.
I have a 2008 Mazda 6 Sport Wagon 2.0 TD. I noticed that right side inner tail light (where the reverse light is) has a decent amount of water inside of it. I washed the car and water level raised a bit more. Is it possible to change the gasket that seals the lens and the frame of the light and how to do that?

 

They are glued in. They warp and leak. You can remove it and drill 2 tiny holes in the bottom to allow it to drain and run a bead of clear silicone around it. Otherwise it will need to be replaced with equally pathetic garbage that will soon do the same thing.