I replaced a front yellow marker with a yellow trailer oval lens. It fits fine, etc, etc. The only difference, and even a Viper owner would not see it easily, is that the OEM lens (not the base) had a slight curvature to it and the trailer lens is flat. But being flat, it still does not stick out at the edges. And for $2.49 (or whatever it costs) you can buy and try, then trash if you think it doesn't work.