Water getting in trunk underneath rubber mat ?
Reply #1 –
It's likely. Pull the carpeted panels out and give it a good inspection...also check around the trunk seal by the rear glass to make sure water isn't pooling up and leaking through a small hole.
But if you have water in the tail light lenses...there's the weak spot(s). I took mine apart once to clean them out (dust) but didn't use the proper sealer during reassembly. Good luck!